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Cybersecurity Briefing — October 23, 2026

The day's most significant cyber-security stories, curated from 50+ sources.

SANS Internet Storm Center Threat Intelligence 1d ago
Critical PHP Vulnerability (CVE-2026-109618, CVE-2026-109619) [infocon yellow], (Wed, Oct 21st)
PHP.net announced that it will release a critical update today. We decided to change the infoCon to YELLOW due to the widespread use of PHP, the expected severity of the flaw (CVSS 9.4), and the availability of early PoC exploits before…
Also covered by Canadian Centre for Cyber Security, Unit 42 (Palo Alto), Kaspersky Securelist, Sucuri Blog
BleepingComputer News 22h ago
GitLab warns of new max severity code execution vulnerability
GitLab has released security patches for a maximum-severity Regular Expression Compiler flaw that can let remote attackers run arbitrary code on vulnerable servers. [...]
Also covered by Zero Day Initiative, CSO Online, Rapid7 Blog
The Hacker News News 15h ago
Arista Warns of Critical VeloCloud SQL Injection Zero-Day Exploited in Attacks
Attackers are exploiting a zero-day SQL injection flaw in Arista's VeloCloud Orchestrator (VCO), the central management system for VeloCloud SD-WAN networks, the company said in an advisory on October 22. The flaw lets anyone who can log…
Also covered by BleepingComputer, SC Media
The Hacker News News 15h ago
eMudhra to Exit Global SSL/TLS Business After 8 Intermediate CA Keys Found Easily Guessable
eMudhra, an Indian certificate authority (CA), will withdraw from its global SSL/TLS certificate business, its board decided on Thursday. The decision came five days after a researcher reported recovering the private keys of eight of its…
Also covered by Unit 42 (Palo Alto), Cisco Talos
Unit 42 (Palo Alto) Threat Intelligence 15d ago
Evolution of Web3 in Cloud Supply Chain Attacks
Unit 42 details how threat actors leverage Web3 infrastructure and open-source supply chain attacks to breach enterprise cloud environments The post Evolution of Web3 in Cloud Supply Chain Attacks appeared first on Unit 42 .
Also covered by Qualys Blog, GitHub Security Blog
BleepingComputer News 14h ago
LiteLLM release pipeline hacked to distribute info-stealer malware
Hackers compromised the LiteLLM project's PyPI package and published malicious Docker images with a payload that steals credentials, secrets, and environment variables. [...]
Also covered by CSO Online
The Record (Recorded Future) Threat Intelligence 17h ago
Microsoft blames ConnectWise attacks on Chinese state hacker using ARTEX AI agents
A Chinese government-aligned hacking group used automated tools to carry out the recent supply chain attack on IT management software company ConnectWise and is using the same techniques to try to compromise organizations around the globe,…
Also covered by Infosecurity Magazine
The Hacker News News 20h ago
INTERPOL Arrests 1,462 Suspects, Disrupts 10,909 Cybercrime Networks in Global Crackdown
INTERPOL on Thursday announced that a coordinated law enforcement action has disrupted 10,909 malicious networks and recovered more than $105 million in illicit funds. In tandem, the effort saw law enforcement agencies from 21 countries…
Also covered by HackRead
BleepingComputer News 20h ago
Amazon says PHP2Shell exploitation began 4 days before patches
Security researchers at Amazon Threat Intelligence say attackers began targeting the PHP2Shell flaws four days before security patches were released on Wednesday. [...]
Also covered by Infosecurity Magazine
CISA ICS Advisories Advisories 22h ago
Siemens Software Center
View CSAF Summary The affected application loads dynamic-link libraries (DLLs) from an uncontrolled search path. This could allow an authenticated local attacker to place a specially crafted DLL in a directory that the application…
Also covered by CISA Known Exploited Vulnerabilities
SANS Internet Storm Center Threat Intelligence 1d ago
ISC Stormcast For Thursday, October 22nd, 2026 https://isc.sans.edu/podcastdetail/10146, (Thu, Oct 22nd)
Also covered by Rapid7 Blog
SentinelOne Research Threat Intelligence 1d ago
Stopping PHP2SHELL: How SentinelOne Protects Customers From This Attack Technique
Stop PHP2Shell with SentinelOne. Learn how Singularity Agent stops web worker post-exploitation, kills process trees, and hunts threats.
Also covered by CrowdStrike
BleepingComputer News 1d ago
PHP ships emergency patches for critical PHP2Shell flaws
The PHP security team released emergency security patches for two critical remote code execution (RCE) vulnerabilities (CVE-2026-109618 and CVE-2026-109619) tracked collectively as PHP2Shell. [...]
Also covered by HackRead
Check Point Research Threat Intelligence 3d ago
19th October – Threat Intelligence Report
For the latest discoveries in cyber research for the week of 19th October, please download our Threat Intelligence Bulletin. TOP ATTACKS AND BREACHES CenterPoint Energy, a US utility company serving Texas and several other states, has…
Also covered by Wordfence
Zero Day Initiative Vulnerabilities 7d ago
ZDI-26-785: FreeBSD Kernel Shared Memory Time-Of-Check Time-Of-Use Local Privilege Escalation Vulnerability
This vulnerability allows local attackers to escalate privileges on affected installations of FreeBSD Kernel. 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
CISA Known Exploited Vulnerabilities Threat Intelligence 7d ago
CVE-2026-102764 added to CISA KEV — BeyondTrust Remote Support
BeyondTrust Remote Support contains an authentication bypass by spoofing vulnerability that could allow a remote attacker to perform file operations on the appliance.
Also covered by Rapid7 Blog
CERT-EU Advisories 7d ago
2026-017: Critical Vulnerability in Cisco Secure Email Gateway
On 14 October 2026, Cisco published a security advisory addressing a critical vulnerability affecting the Advanced Malware Protection (AMP) feature of Cisco Secure Email Gateway. This vulnerability could allow an unauthenticated, remote…
Also covered by CISA Known Exploited Vulnerabilities
JPCERT/CC (Japan) Advisories 9d ago
Security Alert: Microsoft Releases October 2026 Security Updates
Also covered by Qualys Blog
Cisco Talos Threat Intelligence 9d ago
Microsoft Patch Tuesday for October 2026 — Snort rules and prominent vulnerabilities
Microsoft has released its monthly security update for October 2026, which includes 1415 vulnerabilities affecting a range of products, including 85 that Microsoft marked as "critical."
Also covered by CrowdStrike
CERT-EU Advisories 25d ago
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 Cloudflare Security
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