2026-014: Critical Vulnerabilities in Citrix NetScaler ADC and Gateway
On 27 September 2026, Citrix published a security bulletin addressing 8 vulnerabilities affecting customer-managed Citrix NetScaler ADC and Citrix NetScaler Gateway, among which 2 critical unauthenticated Remote Code Execution (RCE)…
Also covered by Canadian Centre for Cyber Security, Rapid7 Blog, CSO Online, Tenable Blog
CISA warns of critical pre-auth RCE flaw in MikroTik RouterOS
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) is warning of a new critical vulnerability in MikroTik RouterOS that could lead to remote code execution or cause a denial-of-service condition. [...]
Also covered by CISA ICS Advisories, CISA Known Exploited Vulnerabilities
Cisco Warns of Attackers Exploiting Critical Authentication Bypass in SD-WAN Manager
Attackers are exploiting a new critical zero-day flaw in Cisco Catalyst SD-WAN Manager, the system companies use to manage their Cisco SD-WAN networks, Cisco said in an advisory on September 30. The flaw, CVE-2026-76504, could allow a…
Also covered by BleepingComputer, Rapid7 Blog
Attackers Abuse ChatGPT Custom GPTs to Deliver RAT via ClickFix Lures
Threat actors are abusing ChatGPT Custom GPTs to disguise them as legitimate product offerings and direct unsuspecting victims to malicious sites that employ ClickFix lures to deliver malware. Huntress, which observed the activity in late…
Also covered by Infosecurity Magazine, Huntress
ZDI-26-742: Foxit PDF Reader FoxitUpdater Race Condition Local Privilege Escalation Vulnerability
This vulnerability allows local attackers to escalate privileges on affected installations of Foxit PDF Reader. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this…
Also covered by Elastic Security Labs, Reddit r/netsec
Safe word: What is it and why do you need one?
AI scams are now hyper-realistic. But there’s one simple way to see through them.
Also covered by Qualys Blog, Graham Cluley
Microsoft Patch Tuesday for September 2026 — Snort rules and prominent vulnerabilities
Microsoft has released its monthly security update for September 2026, which includes 973 vulnerabilities affecting a range of products, including 113 that Microsoft marked as "critical."
Also covered by CrowdStrike, Sucuri Blog
The State of AI-Enabled Malware August 2026: From Brand Abuse to Agentic Execution
Explore Unit 42 research on AI-enabled malware. Learn how existing behavioral detection and endpoint analytics stop AI-authored code before execution. The post The State of AI-Enabled Malware August 2026: From Brand Abuse to Agentic…
Also covered by Check Point Research, Elastic Security Labs
A Deep Dive into the GetProcessHandleFromHwnd API
In my previous blog post I mentioned the GetProcessHandleFromHwnd API. This was an API I didn’t know existed until I found a publicly disclosed UAC bypass using the Quick Assist UI Access application. This API looked interesting so I…
Also covered by AWS Security Blog, Bitdefender Labs
Hackers stole Pentagon personnel records of over 3 million people
The Pentagon's Defense Manpower Data Center (DMDC) is notifying millions of military service members that hackers stole their data after breaching the Pentagon's human resources management system in October 2025. [...]
Also covered by TechCrunch (Security)
Google Rolls Out Gemini 4 Argon to Trusted Cyber Defenders, Plans Guardrail-Free Version
Google on Wednesday announced its latest frontier artificial intelligence (AI) model, Gemini 4 Argon, that it said is being rolled out to a set of trusted cyber defenders through its Fairwind Program. "It delivers frontier performance in…
Also covered by SecurityWeek
Metamask discloses security incident affecting its infrastructure
On Thursday, cryptocurrency wallet provider MetaMask has disclosed an ongoing infrastructure security incident affecting some of its infrastructure. [...]
Also covered by The Hacker News
ScreenConnect Client (Ab)used by Attackers, (Thu, Oct 1st)
Threat Actors do not always use top-notch techniques or very complex malware to perform their attacks. Sometimes, they just abuse of existing applications...
Also covered by The Hacker News
Bitget Confirms Third-Party Zero-Day Behind $387.5 Million Cryptocurrency Theft
Cryptocurrency exchange Bitget on Wednesday confirmed that attackers who stole $387.5 million last week exploited a zero-day flaw in third-party security products, citing ongoing investigation findings from SlowMist. "Their investigation…
Also covered by BleepingComputer
Over 543,000 valid credentials exposed in public GitHub repositories
More than 543,000 credentials exposed in public GitHub repositories were still valid in July despite the platform's security measures to prevent accidental leaks of sensitive data. [...]
Also covered by SecurityWeek
Microsoft to block Entra ID script injection attacks starting October
Microsoft has reminded customers that the Entra ID authentication system will get better protection against external script injection attacks starting next month. [...]
Also covered by SC Media
US-Focused CSuite Phishing Steals Microsoft 365 Sessions and Deploys RMM Tools for Remote Access
ANY.RUN researchers traced a US-focused CSuite phishing campaign across 351 sandbox analyses, with 51% of submissions coming from the United States. Technology, manufacturing, government, and consulting organizations showed the highest…
Also covered by Microsoft Security
OpenSSL Fixes High-Severity DTLS Flaw That Can Leak Heap Memory Unencrypted
A High-severity OpenSSL flaw can leak heap memory to the other side of a DTLS connection or crash the program, OpenSSL said on September 29 as it released fixes. DTLS, the TLS variant used for UDP traffic, resends a handshake message if no…
Also covered by SC Media
Citrix NetScaler CVE-2026-88772 Exploit Details Show Pre-Auth Path to Shellcode Execution
Cybersecurity researchers have disclosed technical details of a recently patched critical security flaw in Citrix NetScaler ADC and Gateway that has come under active exploitation in the wild. The vulnerability, tracked as CVE-2026-88772…
Also covered by CISA Known Exploited Vulnerabilities
ZDI-26-750: WatchGuard FireWare OS spamd statushdlr Stack-based Buffer Overflow Remote Code Execution Vulnerability
This vulnerability allows remote attackers to execute arbitrary code on affected installations of WatchGuard FireWare OS. Authentication is required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.2. The following…
Also covered by SecurityWeek