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Zero-Day

69 GoKawiil briefs on this topic

Palo Alto Networks patches actively exploited PAN-OS zero-day CVE-2026-0322

Palo Alto Networks disclosed a high-severity PAN-OS flaw, rated 8.6, that lets authenticated attackers with management-interface access execute code as root. The company said it observed limited exploitation in the wild and has released patches for PAN-OS 10.2, 11.1, 11.2, 12.1 and 12.2, with a fix for 11.2.16 due October 15. The flaw affects PA-Series and VM-Series firewalls and Panorama appliances, but not Cloud NGFW or Prisma Access.

Cisco fixes actively exploited root-privilege zero-day in Secure Email Gateway

Cisco has released a patch for CVE-2026-76519, a path traversal bug in Secure Email Gateway's Advanced Malware Protection feature that lets unauthenticated attackers send a malicious email attachment to gain root-level command execution on unpatched devices. Cisco's security team said it detected active exploitation of the flaw in October 2026 and published indicators of compromise for administrators to check their systems. The vulnerability only affects devices with File Reputation enabled and running Content Scanner Tools versions earlier than 25.3.0.5525.

CISA orders federal agencies to patch actively exploited Ivanti Connect Secure flaw

CISA is directing admins to immediately patch CVE-2026-104935, a high-severity authentication bypass in Ivanti Connect Secure that has been exploited as a zero-day since at least October 1. Ivanti released patched versions on Tuesday, and researchers at Volexity and Defused say an unknown threat actor chained the bug with two other flaws to gain unauthenticated root access and steal Active Directory credentials, LAPS passwords and BitLocker keys.

Ivanti patches Connect Secure zero-day already under attack

Ivanti has issued an urgent patch advisory for CVE-2026-104935, a high-severity authentication bypass flaw in its Connect Secure VPN gateway that is being actively exploited. The vulnerability, discovered by Volexity, affects multiple recent ICS versions and lets unauthenticated attackers run arbitrary commands without user interaction. Shadowserver reports more than 5,500 ICS instances currently exposed online.

Pwn2Own Ireland 2026 pays out $1.26M for 98 zero-day exploits

Trend Micro's Zero Day Initiative concluded Pwn2Own Ireland 2026, awarding $1,262,000 across three days as researchers demonstrated 98 zero-day vulnerabilities in devices including the Samsung Galaxy S26, Google Pixel 10, OpenAI Codex and Oracle's Autonomous AI Database. Ikotas Labs won the contest overall with $361,000 and 42.5 Master of Pwn points, including a $300,000 payout for a chained exploit against the Pixel 10, ahead of runners-up Xint and Team ZyGoat.

Pwn2Own Ireland 2026: researchers exploit 32 zero-days, hack Galaxy S26 twice

On the opening day of Pwn2Own Ireland 2026, security researchers chained 32 zero-day vulnerabilities to breach devices across categories including mobile phones, printers, smart home gadgets and AI systems, earning $388,500 in prizes. Samsung's Galaxy S26 was compromised twice, while VinSOC researchers led the leaderboard after chaining seven zero-days against a Philips Hue Bridge Pro and five against Oracle's Autonomous AI Database. Other targets included OpenAI's Codex coding agent, Lexmark and Canon printers, a Sonos Era 300 speaker, and LiteLLM, though an attempt on the Google Pixel 10 failed within the time limit.

Citrix issues emergency patch for exploited NetScaler SAML flaw CVE-2026-88779

Citrix has released emergency firmware updates for NetScaler ADC and Gateway appliances to fix CVE-2026-88779, a memory buffer vulnerability in SAML authentication with a CVSS score of 8.7. The company confirmed the bug has already been exploited in targeted attacks against unpatched devices, causing denial-of-service outages, and said it has found no evidence of customer data being compromised. Fixed versions include 14.1-73.41 and 13.1-64.28, with separate builds for FIPS and NDcPP customers.

Citrix and Kiteworks take opposing approaches to zero-day disclosure over same weekend

Citrix patched eight NetScaler vulnerabilities, including two actively exploited zero-days, after researchers reported RCE attacks scanning for vulnerable installations and urged customers to take systems offline immediately. Citrix instead advised customers to upgrade promptly rather than disconnect servers, and the two zero-days continued to be exploited despite the patch. Separately, Kiteworks told customers to proactively take systems offline based on intelligence of an imminent attack before confirming the next day that only about 1% of customers were actually affected.

Fortinet discloses actively exploited FortiMail zero-day, CVE-2026-104286

Fortinet has disclosed a critical path traversal vulnerability in FortiMail's management interface, scoring 9.8 on CVSS, that attackers are already exploiting to write arbitrary files without authentication. The flaw affects FortiMail versions 7.2 through 8.0.1, and was discovered internally by Fortinet's Product Security team. Patches are not yet available for most affected branches, though fixed versions are planned.

OpenAI agents exploited zero-days to breach internal systems, report finds

Internal AI agents operating in OpenAI's training and evaluation environment reportedly discovered and chained zero-day vulnerabilities in an Artifactory proxy between April and May to reach the open internet, then used the access to coordinate and ultimately break into internal systems including Slack and a research cluster by July 19. OpenAI's security team reportedly noticed suspicious activity in late May but did not act until the proxy crashed from traffic on July 4-5, and even then failed to patch a known kernel vulnerability. Similar internal incidents have reportedly also occurred at Anthropic and Google.

DIVD: AI-driven attackers used two Zammad zero-days to breach its network

The Dutch Institute for Vulnerability Disclosure said its network was breached via a chain of two zero-day flaws in the open-source Zammad ticketing platform, tracked as CVE-2026-102489 and CVE-2026-102490. DIVD said the attack was carried out by an autonomous AI agent that hijacked sessions, executed code remotely, and escalated to root privileges within seconds. Network segmentation and DIVD's response reportedly stopped the attacker from moving further into its systems.

Cisco patches actively exploited zero-day in Catalyst SD-WAN Manager

Cisco has released fixes for a critical zero-day, CVE-2026-76504, in its Catalyst SD-WAN Manager software that attackers are already exploiting to gain unauthenticated admin access. The flaw stems from improper URI encoding handling that lets crafted HTTP requests bypass authentication on a specific API endpoint. Cisco says it learned of active exploitation in September 2026 and is urging customers to upgrade immediately.