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Cyber security news, as it breaks.
Updated 125 stories in 24 hours
Zero-Day Vulnerabilities
Malware, exploited flaws, phishing and botnets, from the researchers who found them.
13stories this week
0today
the last seven days
Most fromThe Hacker News, Security Affairs, BleepingComputer, CSO Online UK
In the news hereCisco3Ivanti2Palo Alto Networks2Apple1
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Go 1.27.3 and Go 1.26.10, released on October 20, make Go’s certificate verifier reject any certificate chain that passes through one of eight intermediate certificate authority keys. Programs built on the new release will refuse connections to sites and services whose certificates were issued under those keys. The Go team says the keys belong to…
The Hacker News
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Justin.sh is reporting on a confidential Cellebrite document that has been leaked to him: Cellebrite calls it Advanced Unlocks (AU from here on), not to be confused with the “advanced unlocking services” they’ve marketed for years. A press release from earlier this year confirms AU is a new product for 2026. According to Cellebrite, AU:…
Schneier on Security
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F5 has released out-of-band security patches to address multiple NGINX web server flaws, including three critical-severity vulnerabilities that can let attackers execute code on vulnerable systems.
BleepingComputer
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U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Fortinet Multiple Products and BeyondTrust Remote Support flaws to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added the following vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog: This week, Palo Alto Netwoks researchers reported that PEERSTITCH malware exploited FortiManager to expose…
Security Affairs
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Ivanti, Cisco, and Palo Alto Networks all had vulnerabilities in edge devices come under fire this week. Now BeyondTrust joins the group.
Dark Reading
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Researchers said the first known attack by Armory Castle, also known as UNC5221, occurred almost seven weeks ago. The threat group previously compromised Ivanti and Citrix customers.
CyberScoop
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Researchers say the hacker is harvesting credentials and stealing sensitive information.
Cybersecurity Dive
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An alleged Chinese state-backed group is using a new zero-day affecting BeyondTrust IT support software to conduct espionage attacks.
The Record
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U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds Atlassian flaw to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added an Atlassian flaw, tracked as CVE-2026-21589 (CVSS score of 9.3), to its Known Exploited Vulnerabilities (KEV) catalog. In early October, threat actors started exploiting CVE-2026-21589, a critical arbitrary file access…
Security Affairs
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Armory Castle exploited CVE-2026-102764 for initial access, deployed custom tools, and deleted logs and artifacts.
SecurityWeek
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Organizations running self-hosted BeyondTrust Remote Support should treat exposed appliances as potentially compromised after a suspected Chinese espionage group exploited a critical zero-day to gain root control, access credential vaults, and establish footholds for lateral movement, according to Mandiant and Google Threat Intelligence Group. “Organizations should prepare for potential widespread exploitation following this disclosure,” Google…
CSO Online UK
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The China-nexus cyber espionage group tracked as Armory Castle (previously UNC5221 or Warp Panda) exploited a newly disclosed security flaw in BeyondTrust Remote Support (formerly Bomgar) as a zero-day in late August 2026. The vulnerability, tracked as CVE-2026-102764 (CVSS score: 9.3), is a case of improper origin validation in an internal messaging component that could…
The Hacker News
