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Linux Kernel ZcopyReaper Vulnerability Lets Local Attackers Gain Root Privileges

Linux kernel RDS zero-copy flaw CVE-2026-43502 (ZcopyReaper) lets unprivileged local users gain root; fix in 7.1-rc3, public PoC published.

CVE-2026-43502, dubbed ZcopyReaper, is a Linux kernel local privilege escalation flaw in the RDS zerocopy send path, present since kernel 4.17, allowing unprivileged local attackers to gain root. NebuSec researcher Yuan Tan demonstrated root escalation on openSUSE kernel 6.4.0-150600.23.100; the fix landed in commit 44b550d88b26 with Linux 7.1-rc3 the first patched mainline release. Exploitation requires CONFIG_RDS and CONFIG_RDS_TCP but not unprivileged user namespaces, and PoC exploit material is publicly released alongside more than 20 other exploitable 2026 kernel CVEs.

Critical Issabel PBX Command Execution Vulnerability Exploited in the Wild

Unauthenticated attackers exploit CVE-2026-89026 in Issabel PBX via forged JWT tokens to run OS commands; exploitation observed since September 9.

CVE-2026-89026 (CVSS v4 9.3) stems from a hard-coded HS256 JWT signing key in Issabel Framework's pbxapi/index.php, letting unauthenticated attackers forge bearer tokens and execute OS commands through the Asterisk Manager Interface originate endpoint. Issabel Framework versions before commit b97dbaf0b71c1c36f841e672b664afbeb02773bd are affected. Shadowserver Foundation first observed exploitation on September 9, 2026, and VulnCheck added the flaw to its Known Exploited Vulnerabilities database.

Cyber Security Newsupdated · 3h agofirst · 5h agoExploit / PoC in the wild 2 sourcesCVE-2026-890261

Public PoC Released for Apache Superset SQL Injection Vulnerability

A public Python PoC exploit is available for CVE-2026-23980, an authenticated error-based SQL injection in Apache Superset versions before 6.0.0.

CVE-2026-23980 is a SQL injection flaw (CWE-89) in Apache Superset affecting all releases before 6.0.0, exploitable via the sqlExpression and where parameters by authenticated users with read-level access. A public repository containing a Python exploit.py proof-of-concept has been released, reducing attacker effort against exposed instances. Apache disclosed the issue on February 24, 2026 and fixed it in Superset 6.0.0. Defenders should upgrade and monitor logs for malformed queries, database errors, and unusual activity from low-privilege accounts.

Cyber Security Newsupdated · 9h agofirst · 10h agoExploit / PoC 2 sourcesCVE-2026-23980

CISA Warns of Cisco Secure Email Gateway 0-Day Vulnerability Actively Exploited in Attacks

CISA added actively exploited Cisco Secure Email Gateway SQL injection flaw CVE-2026-76461 to its KEV catalog, enabling unauthenticated root command execution.

CVE-2026-76461 is an unauthenticated SQL injection (CWE-89) in Cisco AsyncOS for Cisco Secure Email Gateway appliances, allowing remote attackers to execute arbitrary OS commands with root privileges. CISA added the flaw to the KEV catalog on September 14, 2026, requiring federal civilian agencies to apply vendor mitigations by September 17, 2026, and forensic triage under BOD 26-04. A compromised gateway could let attackers alter email security policies, access stored messages, disable logging, and pivot into enterprise networks.

Cyber Security Newsupdated · 4h agofirst · 1d agoExploit / PoC in the wild 17 sourcesCVE-2026-76461

Marimo RCE Flaw Lets Hackers Steal AWS Credentials and Pivot to Bastion Host in 8 Seconds

Attacker exploited unauthenticated marimo WebSocket RCE CVE-2026-39987 to steal AWS credentials and SSH into a bastion host in eight seconds.

Sysdig Threat Research Team documented a real intrusion exploiting CVE-2026-39987 in marimo (versions up to 0.20.4, fixed in 0.23.0), where the unauthenticated /terminal/ws WebSocket endpoint exposed an interactive shell. Within eight seconds the attacker pulled AWS credentials from Redis, extracted an SSH private key from AWS Secrets Manager via Boto3, and authenticated to a bastion host; over nine hours the operator ran 850+ commands using a staged custom Python toolkit. Blocked EC2 Instance Connect attempts (SendSSHPublicKey to placeholder instance i-0000000000000000) provide a high-confidence detection signal.

GBHackersupdated · 1d agofirst · 1d agoExploit / PoC in the wild 4 sourcesCVE-2026-399872· 1 read

Perfect-10 GitLab bug under attack days after patch lands

CISA confirms active exploitation of CVSS 10.0 GitLab path traversal flaw CVE-2026-85706 days after patches shipped, enabling unauthenticated arbitrary file reads.

CISA added CVE-2026-85706, a maximum-severity 10.0 CVSS path traversal flaw in GitLab's repository commits API, to its Known Exploited Vulnerabilities catalog and confirmed active exploitation. The bug allows unauthenticated attackers to read arbitrary files, including configuration data and credentials, from self-managed GitLab CE/EE servers via a single HTTP POST request. GitLab shipped fixes on September 10 in versions 19.3.2, 19.2.6, and 19.1.8, covering versions 18.7 through 19.3. watchTowr is observing probes against internet-facing instances and warns widespread exploitation is likely to follow quickly.

The Register · Securityupdated · 1d agofirst · 2d agoExploit / PoC in the wild 18 sourcesCVE-2026-85706

Weekly Cybersecurity Newsletter Bulletin – Microsoft 0-day, FortiOS, PAN-OS Flaw, Revolut Data Breach, and 20+ Stories

Weekly roundup: Microsoft patches 973 flaws including two actively exploited zero-days; FortiOS CAPWAP flaw deploys PivotC2 RAT; PAN-OS root RCE disclosed.

Microsoft's September 2026 Patch Tuesday fixed 973 vulnerabilities, including two zero-days under active exploitation: CVE-2026-85880 (Windows ALPC) and CVE-2026-81963 (Windows Update Stack), both elevation-of-privilege bugs. SOCRadar reported active exploitation of CVE-2025-25249 (CVSS 9.8) in FortiOS CAPWAP, deploying a Node.js RAT called PivotC2 that exfiltrates Exchange mailboxes to Wasabi cloud storage; 178 devices were compromised out of 30,000 scanned IPs, attributed to a Russian-speaking financially motivated group. Palo Alto disclosed CVE-2026-0310, a 9.2-rated buffer overflow enabling root code execution on PA-Series firewalls, and Fortinet disclosed CVE-2026-84393, a ZTNA certificate validation MITM flaw. Cyera also revealed CVE-2026-6471 ('PostGREShell'), a 12-year-old PostgreSQL logical-decoding flaw allowing code execution via REPLICATION-privileged accounts.