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ZDI-26-644: Oracle VirtualBox VMSVGA Race Condition Local Privilege Escalation Vulnerability

ZDI publishes ZDI-26-644 for CVE-2026-60155, a race condition local privilege escalation in Oracle VirtualBox VMSVGA, rated CVSS 7.5.

Zero Day Initiative published advisory ZDI-26-644 describing a race condition in Oracle VirtualBox's VMSVGA component. Local attackers who already execute high-privileged code on the guest system can escalate privileges on affected installations. ZDI rated the issue CVSS 7.5 and assigned CVE-2026-60155.

ZDI Published Advisories · 7d agoAdvisory 6 sourcesCVE-2026-60155

Three Critical VMware Flaws Allow Auth Bypass, Code Execution, and VM Escape

Broadcom patches three critical VMware flaws, including vCenter auth bypass CVE-2026-59309 and an ESX VM escape, urging immediate updates.

Broadcom issued emergency updates for VMware ESX, vCenter, Workstation and Fusion, fixing five flaws including CVE-2026-59309 (CVSS 9.8 authentication bypass in vCenter) and CVE-2026-59310 (CVSS 9.8 directory traversal allowing code execution). CVE-2026-47876 (CVSS 9.3) is an out-of-bounds write in the ESX VMXNET3 adapter that permits a virtual machine escape to the host. Broadcom found no evidence of exploitation, but Defused Cyber reported a spike in vCenter scanning on August 11, 2026 consistent with exploitation attempts against CVE-2026-59309 (VMSA-2026-0006). No workarounds are available.

The Hacker News · Aug 11, 2026VulnerabilityCVE-2026-59309CVE-2026-59310CVE-2026-47876+2 CVEs1

Vali Cyber ZeroLock 5 brings MFA to the hypervisor command line

Vali Cyber released ZeroLock 5 adding CLI-MFA to protect VMware ESX and Linux hypervisors from insider threats and stolen credentials.

ZeroLock 5 introduces CLI-MFA, requiring time-based one-time passwords for file access, program execution, and network operations at the hypervisor command line on ESX and Linux hosts. The release targets ransomware and nation-state actor pivots to virtualization infrastructure, exemplified by ShinyHunters' shinysp1d3r RaaS platform that encrypts VMware ESX environments using stolen credentials and SSH keys. It adds remotely deployable collectors, reusable multi-site deployment blueprints, SIEM forwarding presets, and support for VCF and ESX 6.7+.

Help Net Security · 14d agoTools

Critical VMware Workstation and Fusion Flaw Lets VM Admins Execute Host Code

Broadcom patched two VMware Workstation and Fusion flaws, including critical integer overflow CVE-2026-59346 (CVSS 9.3), letting guest admins execute host code; no exploitation seen.

Broadcom released updates fixing CVE-2026-59346 (CVSS 9.3), an integer-overflow vulnerability allowing a malicious actor with local administrative privileges on a VM with a VMXNET3 adapter to execute code on the host, and CVE-2026-59347 (CVSS 8.1), a stack-based buffer overflow in HGFS allowing code execution as the host's VMX process. Both flaws affect VMware Workstation and Fusion 25H2 and 26H1, have no workarounds, and are fixed in Workstation 26H1u1 and Fusion 26H1u1. No in-the-wild exploitation has been observed, though VMware vCenter flaws CVE-2026-59309 and CVE-2026-59310, the latter suspected of China-nexus APT use, have recently breached 361 unique victim IPs across 47 countries.

The Hacker News · 11d agoVulnerabilityCVE-2026-59346CVE-2026-59347CVE-2026-59309+1 CVEs

Broadcom Patches Critical VMware Workstation and Fusion VM

Broadcom patched critical VMware Workstation and Fusion VM-escape flaws CVE-2026-59346 (CVSS 9.3) and CVE-2026-59347 (CVSS 8.1); update to 26H1u1.

Advisory VMSA-2026-0007 fixes CVE-2026-59346 (CVSS 9.3), an integer overflow in the VMXNET3 virtual network adapter, and CVE-2026-59347 (CVSS 8.1), a stack-based buffer overflow in HGFS. A malicious actor with local administrative privileges inside a VM could execute code on the host in both cases. The flaws affect Workstation and Fusion 25H2 and 26H1 and are fixed in version 26H1u1 with no workarounds available. The bugs were reported independently by researchers working with Trend Micro Zero Day Initiative and by Tencent Xuanwu Lab.

Security Affairs · 11d agoVulnerabilityCVE-2026-59346CVE-2026-593471

Attackers Exploit VMware vCenter Vulnerability to Gain Persistent Remote Access

Attackers actively exploit critical VMware vCenter flaw CVE-2026-59310, installing reverse_ssh backdoors on 361 hosts across 47 countries.

QUIRSO observed active exploitation of CVE-2026-59310 (CVSS 9.8), a directory-traversal flaw in VMware vCenter allowing arbitrary code execution, patched by Broadcom in late July. Attack chains deploy a malicious cron job running the open-source reverse_ssh tool for persistence, with compromised systems phoning home starting August 3, five days after disclosure. Forensics show 361 unique victim IPs in 47 countries, mostly Germany, the U.S., Turkey, Iran, and France, with the actor suspected to be an APT. Separately, Defused Cyber reports rising scanning indicative of exploitation of related CVE-2026-59309, an unauthenticated auth bypass in vmdir.

The Hacker News · Aug 12, 2026Exploit / PoC in the wildCVE-2026-59310CVE-2026-59309

ZDI-26-647: VMware Workstation VMXNET3 TSO Segmentation Integer Overflow Local Privilege Escalation Vulnerability

ZDI disclosed an integer overflow in VMware Workstation's VMXNET3 TSO code (CVE-2026-59346) enabling local privilege escalation.

Zero Day Initiative published ZDI-26-647, a CVSS 7.5 integer overflow in the VMXNET3 TSO segmentation code of VMware Workstation. A local attacker who has already obtained the ability to execute high-privileged code on the guest system can exploit the flaw to escalate privileges on affected installations. The issue is tracked as CVE-2026-59346. No exploitation is reported in the advisory.

ZDI Published Advisories · 7d agoVulnerabilityCVE-2026-59346

VEX-Bench: Benchmarking LLM Agents for Assessing Exploitability of Software Supply Chain Vulnerabilities

Introduces VEX-Bench, 75 expert-labeled real-world cases testing whether LLM agents can assess supply chain vulnerability exploitability; frontier models reach about 80% F1.

VEX-Bench is the first benchmark evaluating LLM agents on assessing whether upstream dependency vulnerabilities are exploitable in downstream projects, with 75 real-world expert-labeled cases across Python, Java, and Go mined from GitHub. Nine models across three agent harnesses were evaluated; GPT-5.5 and Claude Opus 4.6 reach approximately 80% F1 on binary vulnerability-status classification, but only GPT-5.5 surpasses 70% macro-F1 on fine-grained justification classification. The gap highlights the difficulty of moving beyond binary exploitability calls to explaining exploitability reasons, unlike prior benchmarks targeting zero-day settings.

arXiv cs.CR · 8d agoResearch1

vCenter Flaw Exploited Just Five Days After Disclosure

Attackers began exploiting critical vCenter flaw CVE-2026-59310 five days after Broadcom's disclosure, putting enterprise VMware deployments at risk.

Attackers exploited a critical-severity flaw in VMware vCenter, tracked as CVE-2026-59310, just five days after Broadcom disclosed it. vCenter is the management platform for large enterprise VMware virtualization estates, so active exploitation exposes a broad installed base. Defenders running vCenter should prioritize applying Broadcom's patch.

Infosecurity Magazine · Aug 13, 2026Exploit / PoC in the wildCVE-2026-59310

CVE-2026-89775: Guest-to-Host Escape in KVM/arm64

Disclosed CVE-2026-89775 lets a guest VM escape to the host on KVM/arm64 systems with nested virtualization enabled.

Researcher Hyunwoo Kim disclosed CVE-2026-89775, a guest-to-host escape in KVM/arm64, after the embargo agreed with linux-distros maintainers expired. The root cause is a type truncation of the stage-1 walk level that makes a size computation return 0, the value meaning 'size unknown'. The VNCR pseudo-TLB invalidation path then interprets that 0 as a valid value on ARM64 hosts where nested virtualization is enabled.

oss-security · 5h agoVulnerabilityCVE-2026-89775

Mozilla security advisory (AV26-868)

Canada's Cyber Centre reports Mozilla vulnerabilities fixed in Firefox 155 and Firefox ESR 115.40, 140.15, and 153.2.

Canadian Centre for Cyber Security advisory AV26-868, dated September 1, 2026, notes vulnerabilities in Firefox (versions prior to 155) and Firefox ESR (prior to 115.40, 140.15, and 153.2). The bulletin links to Mozilla's security advisories and urges users and administrators to update. No CVE identifiers or exploitation details are provided.

Canadian Centre for Cyber Security · 15d agoAdvisory

ZDI-26-608: Linux Kernel KVM IOAPIC Use-After-Free Local Privilege Escalation Vulnerability

The Linux kernel KVM IOAPIC has a use-after-free (CVSS 8.2) allowing local privilege escalation, but exploitation requires high-privileged code execution first.

ZDI-26-608 describes a use-after-free vulnerability in the Linux kernel's KVM IOAPIC component, with a CVSS score of 8.2. An attacker must first obtain the ability to execute high-privileged code on the target system, which limits the practical impact of the privilege escalation. The advisory text does not list an assigned CVE identifier.

ZDI Published Advisories · 23d agoVulnerability

VU#369611: ExLlamaV3 contains Denial of Service vulnerability via insufficient bounds checking on kernel dispatch index

CERT/CC details CVE-2026-84286, an out-of-bounds memory access in ExLlamaV3's CUDA extension causing denial-of-service crashes; fixed via merged pull request.

CERT/CC published VU#369611 for CVE-2026-84286, an out-of-bounds memory access in the exllamav3_ext CUDA extension of the ExLlamaV3 LLM inference library. A crafted input with kernel parameter K set to 0 produces a negative index into a fixed 24-entry kernel dispatch array, causing a CUDA illegal memory access and denial-of-service crashes. The vendor fixed the issue in the main repository via pull request #310, and maintainers of 49 downstream projects, including ezexl3 and MawDiscord, are advised to rebuild against the patched version. The issue was reported by Nathan Keys and impact is limited to crashes and instability, not code execution.

CERT/CC Vulnerability Notes · 5d agoVulnerabilityCVE-2026-842861

Using a VM to Contain an AI Agent

Bruce Schneier reports GPT 5.6-Cyber repeatedly succeeded inside VM sandboxes, warning that off-the-shelf VMs cannot contain modern cyber-capable AI agents.

In a Schneier on Security post, Bruce Schneier reports that GPT 5.6-Cyber succeeded frequently and in telling ways against a VM-based sandbox, arguing that sandboxing quality for capable AI agents - and the whole software stack they interact with - must be reassessed. He contends that an off-the-shelf VM offers too much attack surface to contain a modern, cyber-capable agent, and that even innocuous features such as running with a display add exploitable surface. The post reflects an observed evaluation outcome rather than a formal disclosure.

Schneier on Security · 12d agoAI safety & security in the wild

⚡ Weekly Recap: VMware Exploits, Windows 0-Day, MCP Attacks, Browser Hijacks and More

Weekly recap: suspected China-nexus APT exploited VMware vCenter CVE-2026-59310, Lazarus used Windows zero-day CVE-2026-68820, and macOS flaw dropped Monero miners.

The week's top stories included a suspected China-nexus APT exploiting VMware vCenter CVE-2026-59310 (CVSS 9.8), a directory-traversal flaw enabling arbitrary code execution, with backdoors, reverse SSH and Babuk-derived ransomware deployed, per QUIRSO. NCSC-NL reported active exploitation of macOS Screen Sharing flaw CVE-2026-65400 (CVSS 9.8) to install Monero miners on systems with port 5900 exposed. Lazarus Group exploited Windows zero-day CVE-2026-68820 (CVSS 7.0) in Operation Dream Job, delivering ForestTiger and Troy backdoors to defense and aerospace targets. GeoServer patched a critical SQL injection flaw exploited within hours of disclosure, and Jamf analyzed the new Amnesia Stealer for macOS with live browser control.

The Hacker News · Aug 17, 2026Exploit / PoC in the wildCVE-2026-59310CVE-2026-65400CVE-2026-688201

CISA: Critical VMware RCE flaw now exploited by ransomware gangs

CISA warns ransomware gangs now exploit critical VMware vCenter syslog RCE CVE-2026-59310, already KEV-listed after APT compromises across 47 countries.

Broadcom patched critical directory traversal flaw CVE-2026-59310 in the vCenter Syslog server on July 29, warning of unauthenticated remote code execution. QUIRSO subsequently found 361 compromised IPs across 47 countries after a suspected APT deployed a reverse SSH tool for persistence and remote access. CISA added the flaw to its KEV catalog with a three-day patch deadline for federal agencies, and over the weekend updated it to flag active abuse by ransomware gangs. Shadowserver tracks over 450 exposed vCenter servers, and CISA has tagged 26 VMware vulnerabilities as exploited in the wild over five years, nine abused by ransomware.

BleepingComputer · 1d agoExploit / PoC in the wildCVE-2026-59310CVE-2025-60710CVE-2025-22225+2 CVEs1

SonicWall security advisory (AV26-884)

Canada's Cyber Centre issued advisory AV26-884 warning that SonicWall Network Security Manager On-Prem 4.3.0 and earlier are affected by multiple vulnerabilities.

The Canadian Centre for Cyber Security published advisory AV26-884 on September 4, 2026, flagging SonicWall Network Security Manager (NSM) On-Prem across VMware, Hyper-V, Azure, and KVM deployments, versions 4.3.0 and earlier, as affected by multiple vulnerabilities. The advisory does not list CVE identifiers, exploit details, or in-the-wild exploitation. Administrators are encouraged to review the referenced links and apply updates as they become available.

Canadian Centre for Cyber Security · 8d agoAdvisory

Coop – Isolated VM Environments for Running Claude Code and Codex

Trail of Bits releases Coop, running Claude Code and OpenAI Codex agents inside isolated virtual machines for safer agentic coding.

Coop, published on GitHub by security firm Trail of Bits, provides isolated VM environments for executing AI coding agents such as Claude Code and Codex. Isolation contains the filesystem and network side effects of autonomous agent actions, reducing risk from unsupervised tool use. The project drew 61 points and 16 comments on Hacker News.

Hacker News · AI · 9d agoAI tools & infraHN 61↑ · 16 comments1

Ivanti EPMM, Neurons and Sentry Vulnerabilities Enable Privilege Escalation and RCE Attacks

Ivanti patched ten CVEs across EPMM, Neurons for ITSM and Sentry, including critical unauthenticated deserialization RCE; no active exploitation reported.

On September 8, 2026, Ivanti disclosed advisories covering ten CVEs in Endpoint Manager Mobile (EPMM), Neurons for ITSM, and Sentry. The most severe are two unauthenticated deserialization RCE flaws in Neurons for ITSM, CVE-2026-12744 and CVE-2026-12745 (CVSS 9.8), plus three missing-authorization RCE bugs rated 9.9 and three authenticated deserialization RCE flaws. EPMM has CVE-2026-18851 (CVSS 8.8), an authenticated privilege escalation flaw, and Sentry has CVE-2026-83527 (CVSS 8.1), an authentication bypass. Ivanti reports no evidence of active exploitation; cloud/SaaS ITSM was patched on August 9, 2026, while on-premises 2025.2 through 2026.1 require September 2026 patches.

Cyber Security News · 8d agoVulnerabilityCVE-2026-18851CVE-2026-12744CVE-2026-12745+7 CVEs

Isolated-vm Flaw Lets Sandboxed JavaScript Escape to Host for Potential RCE

Critical type-confusion flaw in isolated-vm Node.js sandbox (GHSA-864f-rcv7-6rh4) enables guest-to-host escape and potential RCE; fixed in 6.2.0 and 7.0.1.

Endor Labs researcher Cristian-Alexandru Staicu found a type confusion in the ExternalCopy component's handling of the transferList option in isolated-vm, letting sandboxed JavaScript corrupt host-process memory and escalate from controlled-address crashes to full control-flow hijack of the host, i.e., potential remote code execution. The flaw, tracked as GHSA-864f-rcv7-6rh4 with no CVE yet, affects all versions through 7.0.0 of the library, which sees nearly 1 million npm downloads weekly. It was patched in versions 6.2.0 and 7.0.1 released earlier in August 2026, and full exploit details are withheld to prevent attacks. The V8 Isolate boundary itself held; the failure was in the C++ marshalling code bridging host and guest.

The Hacker News · 27d agoVulnerability

VMs won't contain cyber-capable agents

Trail of Bits argues virtual machines alone cannot contain cyber-capable AI agents, challenging VM sandboxing as adequate agent isolation.

Trail of Bits published an analysis arguing that virtual machines will not adequately contain cyber-capable AI agents. The post challenges the assumption that VM-based isolation is sufficient for agents with offensive cyber capabilities, with implications for how autonomous agents should be sandboxed. The available text contains no further technical details.

Lobsters · security · 21d agoAI safety & security

Xen Security Advisory 510 v3 (CVE-2026-79602) - x86: improper handling of HVM emulation return codes

Xen Project released XSA-510 (CVE-2026-79602) fixing mishandled HVM emulation return codes that let PCI-passthrough guests crash Xen.

Xen Security Advisory 510 v3 publicly discloses CVE-2026-79602, improper handling of HVM emulation return codes in the Xen hypervisor on x86. A guest with an assigned PCI device that has at least one BAR in the IO port space can trigger a BUG() in Xen. The advisory was released publicly as version 3.

oss-security · 8d agoVulnerability 4 sourcesCVE-2026-796021

Dell security advisory (AV26-843)

Canada's Cyber Centre issued advisory AV26-843 covering Dell vulnerabilities requiring updates across Alienware, PowerScale, PowerStore, and other products.

The Canadian Centre for Cyber Security published advisory AV26-843 on August 24, 2026, noting Dell products affected by vulnerabilities as of August 17, 2026. Affected products include Alienware Command Center prior to 6.14.20.0, Dell Command Update prior to 5.7.1, Dell Networking OS10 prior to 10.5.6.14, PowerScale OneFS prior to 14.1, PowerStore OS prior to 5.0.0.2, OpenManage Enterprise prior to 4.7.0, ObjectScale prior to 4.3.0.1, Metro Node prior to 4.6.0.4, and others. Users are directed to apply the vendor's updates.

Canadian Centre for Cyber Security · 23d agoAdvisory

Xen Security Advisory 509 v3 (CVE-2026-62437) - x86: DMs may cause mem leak by IRQ binding

Xen Project released XSA-509 (CVE-2026-62437) fixing a memory leak in IRQ tracking when guests with assigned PCI devices are terminated.

Xen Security Advisory 509 v3 publicly discloses CVE-2026-62437, a memory leak affecting the Xen hypervisor on x86. When guests are terminated, cleanup of PCI devices assigned to those guests and removal of associated IRQ tracking structures may fail, leaking memory. The advisory was released publicly as version 3.

oss-security · 8d agoVulnerabilityCVE-2026-62437

VU#687587: AOMEI Backupper amwrtdrv.sys local privilege escalation vulnerability allows arbitrary writes to physical disks

AOMEI Backupper 8.4.0 driver flaw CVE-2026-12780 lets unprivileged users write physical disks and execute UEFI code, bypassing HVCI and EDR.

CERT/CC issued VU#687587 for CVE-2026-12780, an incorrect permission assignment (CWE-732) in the amwrtdrv.sys kernel driver shipped with AOMEI Backupper 8.4.0. The driver exposes a world-accessible device object without a security descriptor, allowing any unprivileged user to write arbitrary physical disk sectors; with Secure Boot disabled, an attacker can modify the GPT and inject a UEFI payload that executes before the OS loads, bypassing HVCI, EDR, Windows Defender and Hyper-V isolation. On TPM-only BitLocker configurations the attack can capture Volume Master Key material during pre-boot. AOMEI has shipped patches; users who cannot update should uninstall the software or disable the amwrtdrv.sys service, and enabling Secure Boot adds defense in depth.

CERT/CC Vulnerability Notes · 6d agoVulnerabilityCVE-2026-127801

Critical Dell ObjectScale Vulnerabilities Allows Malicious Users to Compromise the Affected system

Dell's DSA-2026-393 fixes ObjectScale/ECS flaws including unauthenticated deserialization RCE CVE-2026-70416 rated CVSS 10.0.

Dell advisory DSA-2026-393 (September 10, 2026) covers multiple flaws in ObjectScale and Elastic Cloud Storage (ECS). CVE-2026-70416 is a critical untrusted-data deserialization RCE (CVSS 10.0) in ObjectScale before 4.4.0.0 allowing unauthenticated remote code execution and full environment takeover, credited to researcher WinD39 (Huynh Dinh Vu). Additional issues include CVE-2025-43936 improper authentication (8.1), CVE-2026-26947 privilege management (6.7), CVE-2026-36591-style weak crypto CVE-2025-36591 (4.4), CVE-2026-76104 permission assignment DoS (5.5), plus third-party CVEs in Apache Log4j, liblzma, and the Linux kernel. Dell advises upgrading to version 4.4.0.0 or later (or 4.2.0.1) and restricting management interfaces until patched.

Cyber Security News · 3d agoVulnerabilityCVE-2026-70416CVE-2025-43936CVE-2026-26947+8 CVEs2

WatchGuard security advisory (AV26-865)

Canada's Cyber Centre warns WatchGuard Dimension and Fireware OS vulnerabilities affect multiple versions and urges administrators to apply available updates.

The Canadian Centre for Cyber Security issued advisory AV26-865 (August 31, 2026) noting that WatchGuard products are affected by vulnerabilities as of August 27, 2026. Affected products include Dimension prior to 2.3.1 and Fireware OS prior to 12.12.2, 12.5.20, and 2026.2.2. Users and administrators are encouraged to review the advisory link and apply updates as they become available.

Canadian Centre for Cyber Security · 16d agoAdvisory