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Four Nation-State Actors Used the Same Chrome Zero-Day Exploit Kit Within 12 Days

Proofpoint reports four nation-state actors, mostly China-nexus, adopted the BlueMoon Chrome and Windows zero-day exploit kit within 12 days, targeting US organizations.

Proofpoint tracked an exploit kit dubbed BlueMoon that chains CVE-2026-85046, a Chrome V8 type-confusion bug, with an unnamed V8 sandbox escape and CVE-2026-85880, a Windows kernel privilege escalation using ALPC and the Windows Notification Facility. The first observed use was by China-nexus TA412 (APT31, Violet Typhoon, JungleBamboo) on August 28, 2026 against US NGOs, mining companies, and commodity trading firms, followed by UNK_LateNight targeting US aerospace and defense companies on September 2. Both V8 bugs were patch-gap zero-days: the fix was committed to Chromium on August 7 but reached stable Chrome on September 3, enabling rapid weaponization from public patches. TA412's post-exploitation payload, GemStone, is a malicious browser extension posing as an AI-powered Google Gemini companion that captures keystrokes, cookies, screenshots, and browsing history via a Cloudflare Worker C2.

Security Affairsupdated · 2h agofirst · 6d agoExploit / PoC in the wild 19 sourcesCVE-2026-85046CVE-2026-858801

CISA Adds One Known Exploited Vulnerability to Catalog

CISA added actively exploited Google Pixel improper authorization flaw CVE-2026-58704 to its KEV catalog, mandating federal remediation.

CISA added CVE-2026-58704, an improper authorization vulnerability in Google Pixel devices, to the Known Exploited Vulnerabilities Catalog based on evidence of active exploitation. Under BOD 26-04, Federal Civilian Executive Branch agencies must prioritize remediation of KEV-listed vulnerabilities on exposed assets. CISA urges all organizations to prioritize patching KEV entries.

CISA Advisoriesupdated · 6h agofirst · 8h agoExploit / PoC in the wild 17 sourcesCVE-2026-58704

CISA Adds Three Known Exploited Vulnerabilities to Catalog

CISA added three actively exploited vulnerabilities — two JFrog Artifactory and one ConnectWise ScreenConnect — to its KEV Catalog.

CISA added CVE-2026-42016 (JFrog Artifactory incorrect authorization), CVE-2026-42018 (JFrog Artifactory improper authentication), and CVE-2026-84869 (ConnectWise ScreenConnect improper privilege management and missing authorization) to the Known Exploited Vulnerabilities Catalog based on evidence of active exploitation. BOD 26-04 requires Federal Civilian Executive Branch agencies to prioritize rapid remediation of such high-risk vulnerabilities on publicly exposed assets and to check for prior compromise. CISA urges all organizations to adopt risk-based vulnerability management and prioritize KEV remediation.

CISA Adds One Known Exploited Vulnerability to Catalog

CISA added CVE-2026-85706, an actively exploited GitLab path traversal flaw, to its KEV Catalog, requiring federal agencies to prioritize patching.

CISA added one vulnerability to its Known Exploited Vulnerabilities Catalog based on evidence of active exploitation: CVE-2026-85706, a path traversal vulnerability in GitLab Community Edition and Enterprise Edition. Under Binding Operational Directive (BOD) 26-04, Federal Civilian Executive Branch agencies must prioritize rapid remediation of KEV-listed vulnerabilities on publicly exposed assets, including checking whether systems were compromised before the patch was applied. While BOD 26-04 binds only FCEB agencies, CISA encourages all organizations to adopt risk-based vulnerability management and prioritize KEV remediations.

CISA Advisoriesupdated · 1d agofirst · 5d agoExploit / PoC in the wild 18 sourcesCVE-2026-85706

BlueMoon exploit kit turns Chrome and Windows flaws into attacks

Proofpoint documents BlueMoon exploit kit used by four espionage groups to chain Chrome V8 and Windows flaws via phishing, all now in CISA's KEV.

Proofpoint identified a shared Chrome and Windows exploit kit, BlueMoon, used by four espionage groups against Chrome on Windows within days of one another. Attacks began with phishing emails leading to web pages that exploited two Chrome V8 vulnerabilities, followed by a Windows flaw to escape browser protections and gain higher privileges. The Chrome flaws were patched in Stable on September 3 and 8, 2026, the Windows flaw was fixed in September Patch Tuesday, and all three were actively exploited and added to CISA's KEV catalog. Researchers found clues, but no conclusive evidence, that the kit was developed with AI assistance.

Malwarebytes Labs · 6d agoExploit / PoC in the wild 3 sources1

CISA Adds Two Known Exploited Vulnerabilities to Catalog

CISA added two actively exploited MikroTik RouterOS vulnerabilities, CVE-2026-67277 and CVE-2026-86060, to its KEV catalog, mandating federal remediation.

CISA added CVE-2026-67277 (missing authentication for a critical function) and CVE-2026-86060 (improper neutralization of argument delimiters in a command), both in MikroTik RouterOS, to the Known Exploited Vulnerabilities Catalog based on evidence of active exploitation. Under BOD 26-04, Federal Civilian Executive Branch agencies must prioritize rapid remediation of these flaws on publicly exposed assets that grant total control post-exploitation. Agencies are also required to check whether systems were compromised before patches were applied.

CISA Advisories · 6d agoExploit / PoC in the wildCVE-2026-67277CVE-2026-86060

Off Guard: Breaking LiteLLM from authentication bypass to cloud compromise

Wiz found LiteLLM auth bypass (CVE-2026-59822) and post-auth RCE (CVE-2026-59821) chainable to cloud compromise; the bypass is in CISA KEV with in-the-wild exploitation.

Wiz scanned roughly 3,074 internet-facing LiteLLM deployments and found 9.6% accepted the default master key sk-1234 or required no authentication, making post-auth attacks effectively pre-auth. The MCP endpoint accepts any Bearer token and grants a valid session (CVE-2026-59822), confirmed exploited in the wild via honeypots and added to CISA's Known Exploited Vulnerabilities catalog. Custom code guardrails allow post-auth root-level RCE via exec(compile(...)) (CVE-2026-59821), while pass-through endpoints lack URL validation, enabling cloud credential theft in post-auth scenarios. All assigned vulnerabilities have been patched; the research was presented at DEF CON 34.

Wiz Blog · 7d agoExploit / PoC in the wildCVE-2026-59822CVE-2026-598211

CISA Adds Four Known Exploited Vulnerabilities to Catalog

CISA added four actively exploited vulnerabilities—Fortinet buffer overflow, Citrix NetScaler and Cisco auth bypasses, and a Chromium V8 write—to the KEV Catalog.

CISA added CVE-2025-25249 (Fortinet heap-based buffer overflow), CVE-2026-19490 (Citrix NetScaler authentication bypass), CVE-2026-87491 (Google Chromium V8 out-of-bounds write), and CVE-2026-20079 (Cisco Firewall Management Center authentication bypass) to its Known Exploited Vulnerabilities Catalog based on evidence of active exploitation. Under Binding Operational Directive 26-04, Federal Civilian Executive Branch agencies must prioritize rapid remediation of these high-risk vulnerabilities on exposed assets and verify whether systems were compromised before patching. CISA encourages all organizations to adopt risk-based vulnerability management and prioritize KEV Catalog remediation.

CISA Advisories · 7d agoExploit / PoC in the wildCVE-2025-25249CVE-2026-19490CVE-2026-87491+1 CVEs

CISA Adds Four Known Exploited Vulnerabilities to Catalog

CISA added four actively exploited vulnerabilities to its KEV catalog, covering Adobe Commerce/Magento, Microsoft Windows, and N-able N-central.

CISA added CVE-2026-75650 (Adobe Commerce and Magento, improper neutralization in a template engine), CVE-2026-81963 (Microsoft Windows link following), CVE-2026-85880 (Microsoft Windows heap-based buffer overflow), and CVE-2026-86218 (N-able N-central static code injection) to the Known Exploited Vulnerabilities Catalog based on evidence of active exploitation. Under Binding Operational Directive 26-04, federal civilian agencies must prioritize rapid remediation of KEV-listed vulnerabilities on exposed assets that grant total control post-exploitation and check for pre-patch compromise. All organizations are encouraged to prioritize these flaws in risk-based patching.

CISA Advisories · 8d agoExploit / PoC in the wildCVE-2026-75650CVE-2026-81963CVE-2026-85880+1 CVEs1

CISA Adds One Known Exploited Vulnerability to Catalog

CISA added CVE-2026-85046, a Google Chromium V8 type confusion vulnerability with evidence of active exploitation, to its KEV Catalog.

On September 4, 2026, CISA added one vulnerability to the Known Exploited Vulnerabilities Catalog: CVE-2026-85046, a type confusion flaw in Google Chromium's V8 engine, added based on evidence of active exploitation. CISA notes type confusion is a frequent attack vector and poses significant risk to the federal enterprise. Under Binding Operational Directive 26-04, Federal Civilian Executive Branch agencies must prioritize remediation of KEV vulnerabilities on exposed assets and check for pre-patch compromise; all organizations are urged to prioritize the patch.

CISA Advisories · 12d agoExploit / PoC in the wildCVE-2026-85046

CISA Adds Seven Known Exploited Vulnerabilities to Catalog

CISA added seven actively exploited vulnerabilities to its KEV catalog, including SonicWall SMA1000 SSRF and command injection flaws.

CISA added seven vulnerabilities with evidence of active exploitation to its Known Exploited Vulnerabilities catalog on September 2, 2026. The additions cover Sangoma Switchvox SQL injection (CVE-2026-9586), Kludex Starlette request smuggling (CVE-2026-48710), Kestra OS command injection (CVE-2026-49869), BerriAI LiteLLM (CVE-2026-59822) and JFrog Artifactory (CVE-2026-82329) authentication flaws, and SonicWall SMA1000 SSRF (CVE-2026-83548) and command injection (CVE-2026-83549) vulnerabilities. Under BOD 26-04, federal civilian agencies must prioritize rapid remediation of KEV-listed vulnerabilities on publicly exposed assets.

CISA Advisories · 14d agoExploit / PoC in the wildCVE-2026-9586CVE-2026-48710CVE-2026-49869+4 CVEs

BGP hijack infecting networks caused by a comedy of errors that’s not funny at all

Attackers BGP-hijacked Softaculous IP space via Hetzner routing lapses to push malicious Virtualizor updates to hosting servers.

Unknown attackers hijacked the 162.55.80.0/24 prefix used by Softaculous' Virtualizor update service by abusing lax routing security at hosting provider Hetzner Online, announcing the range through AS6204, AS62390, and AS24940 with a forged but RPKI-valid origin. The hijack pulsed intermittently over roughly 33 hours, delivering modified update packages to Virtualizor servers, which lacked cryptographic code signing for updates. Softaculous says only a small number of servers were likely affected but cannot produce a definitive list, urging administrators to treat every Virtualizor server as in scope for checks.

Ars Technica · Security · 14d agoExploit / PoC in the wild1

SharePoint RCE CVE-2026-45659 Added to CISA KEV After Active Exploitation

CISA adds actively exploited SharePoint RCE CVE-2026-45659 (CVSS 8.8) to KEV; an August 11 update confirms ransomware groups are exploiting the flaw.

CVE-2026-45659 is a deserialization of untrusted data RCE in Microsoft SharePoint Server affecting Subscription Edition, 2019, and 2016, patched by Microsoft in May 2026. An authenticated attacker with at least Site Member permissions can execute code remotely over the network. CISA added the flaw to its KEV catalog on July 2 with a July 4 deadline for federal agencies, and on August 11 confirmed ransomware groups are exploiting it. Microsoft separately described Storm-2603 (Warlock ransomware) and an unrelated actor co-existing in one network, with initial access likely via the Gladinet Triofox flaw CVE-2025-11371 (CVSS 9.1).

The Hacker News · Aug 12, 2026Exploit / PoC in the wildCVE-2026-45659CVE-2025-113711