Latest cybersecurity reporting from selected sources.

NightmareEclipse Says Mitigation Can Exhaust Disk Space, Crash AppsMicrosoft's patch for CVE-2026-50656, known as RoguePlanet, has sparked fresh criticism after researcher NightmareEclipse alleged the mitigation can exhaust disk space, crash applications and leak memory, extending a months-long dispute over Microsoft's handling of multiple zero-day disclosures.

Oracle is warning about a critical PeopleSoft Suite zero-day vulnerability tracked as CVE-2026-35273 that allows unauthenticated remote code execution, with the flaw actively exploited in ShinyHunter data theft attacks. [...]

Microsoft on Tuesday released a mitigation for a BitLocker bypass vulnerability named YellowKey following its public disclosure last week

Microsoft has shared mitigations for YellowKey, a recently disclosed Windows BitLocker zero-day vulnerability that grants access to protected drives. [...]

On Thursday, Microsoft shared mitigations for a high-severity Exchange Server vulnerability exploited in attacks that allow threat actors to execute arbitrary code via cross-site scripting (XSS) while targeting Outlook on the web users. [...]

Mitigation: SSO Access Restricted After Attackers Compromised Fully Patched DevicesNetwork security giant Fortinet locked out cloud customers from its single sign-on service until they update device firmware with a patch against active attacks exploiting an improper access control zero day. Only Fortinet devices running the latest, patched firmware versions can use Fortinet SSO.

Microsoft has silently "mitigated" a high-severity Windows LNK vulnerability exploited by multiple state-backed and cybercrime hacking groups in zero-day attacks. [...]

Security Experts Advise Immediate Patching; Zero-Day Attacks Began Last MonthAffiliates of Russian-speaking ransomware operation Medusa began targeting a zero-day vulnerability in widely used Fortra GoAnywhere Managed File Transfer software one week before the vendor issued a security alert, patch and mitigation instructions for the flaw, say security experts.

Cisco is urging customers to patch two security flaws impacting the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software, which it said have been exploited in the wild

Microsoft Researchers Link Turkish Spy Group to Output Messenger Zero-Day HackA Turkish-linked cyberespionage group known as Marbled Dust exploited a zero-day in the Output Messenger Server Manager application to spy on Kurdish military operations in Iraq. Microsoft reported the hack and called for immediate mitigation to block credential theft and malware delivery.

Apple has patched a zero-day vulnerability being exploited in targeted attacks

The security provider published mitigation measures to prevent exploitation

Factory resets and apply patches is the advice amid fortnight delay for other appliances The cybersecurity industry is urging those in charge of defending their orgs to take mitigation efforts "seriously" as Ivanti battles two dangerous new vulnerabilities, one of which was already being exploited as a zero-day.…

The second zero-day vulnerability found in Windows NTLM in the past two months paves the way for relay attacks and credential theft. Microsoft has no patch, but released updated NTLM cyberattack mitigation advice.

Ivanti warned admins to stop pushing new device configurations to appliances after applying mitigations because this will leave them vulnerable to ongoing attacks exploiting two zero-day vulnerabilities. [...]

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Friday issued an emergency directive urging Federal Civilian Executive Branch (FCEB) agencies to implement mitigations against two actively exploited zero-day flaws in Ivanti Connect Secure (ICS) and Ivanti Policy Secure (IPS) products

US Agencies Told to Remove Ivanti's Affected Products From Federal NetworksThe U.S. Cybersecurity and Infrastructure Security Agency directed federal agencies to implement mitigation measures for two zero-day exploits that affect Ivanti’s popular VPN products while they await a patch, in what one official described as "a rapidly evolving situation."

Customers still patchless and mitigation only goes so far There's a "reasonable chance" that Ivanti Connect Secure (ICS) VPN users are already compromised if they didn't apply the vulnerability mitigation released last week, experts say.…

Patches will be available in late January and February, but until then, customers must take mitigation measures.

Just a day after Cisco disclosed CVE-2023-20198, it remains unpatched, and one vendor says a Shodan scan shows at least 10,000 Cisco devices with an implant for arbitrary code execution on them. The vendor meanwhile has updated the advisory with more mitigation steps.