Latest cybersecurity reporting from selected sources.

Cisco on Thursday released security updates for a maximum-severity security flaw impacting Cisco AsyncOS Software for Cisco Secure Email Gateway and Cisco Secure Email and Web Manager, nearly a month after the company disclosed that it had been exploited as a zero-day by a China-nexus advanced persistent threat (APT) actor codenamed UAT-9686

No timeline for a patch Suspected Chinese-government-linked threat actors have been battering a maximum-severity Cisco AsyncOS zero-day vulnerability in some Secure Email Gateway (SEG) and Secure Email and Web Manager (SEWM) appliances for nearly a month, and there's no timeline for a fix.…

Broadcom has patched a high-severity privilege escalation vulnerability in its VMware Aria Operations and VMware Tools software, which has been exploited in zero-day attacks since October 2024. [...]

A newly patched security flaw impacting Broadcom VMware Tools and VMware Aria Operations has been exploited in the wild as a zero-day since mid-October 2024 by a threat actor called UNC5174, according to NVISO Labs

A Chinese hacking group is deploying Warlock ransomware on Microsoft SharePoint servers vulnerable to widespread attacks targeting the recently patched ToolShell zero-day exploit chain. [...]

PLUS: China upgrades smartphone surveillance tools; Ring eases anti-snooping stance; and more Infosec In Brief Microsoft has warned users of SharePoint Server that three on-prem versions of the product include a zero-day flaw that is under attack – and that its own failure to completely fix past problems is the cause.…

Chinese-speaking hackers have exploited a now-patched Trimble Cityworks zero-day to breach multiple local governing bodies across the United States. [...]

Ivanti has released security updates to patch a critical Connect Secure remote code execution vulnerability exploited by a China-linked espionage actor to deploy malware since at least mid-March 2025. [...]

Suspected Chinese Attackers Again Tied to Active Exploitation of VPN AppliancesVPN appliance maker Ivanti has begun releasing updates to patch a zero-day vulnerability being actively exploited by suspected nation-state attackers. Experts are warning users to immediately update their devices, after factory resetting them to flush any malware attackers may have installed.

No Patch Yet Available for Second Zero Day to Be Recently Found in VoIP SoftwareSecurity researchers warn of a newly discovered zero-day vulnerability in widely used VoIP telephony software, a discovery that comes as the United States struggles to evict Chinese nation-state hackers from telecom networks. The software is the MiCollab software suite from Canada-based Mitel.

Targeted Versa Software Used by Service Providers to Manage Wide Area NetworksChinese nation-state attackers are actively exploiting a zero-day vulnerability in Versa Director software, used by major internet and managed service providers to deploy, configure and monitor network infrastructure, security experts warn. Versa updated its software last month to patch the flaw.

A South Korea-aligned cyber espionage has been linked to the zero-day exploitation of a now-patched critical remote code execution flaw in Kingsoft WPS Office to deploy a bespoke backdoor dubbed SpyGlace

Details have emerged about a China-nexus threat group's exploitation of a recently disclosed, now-patched security flaw in Cisco switches as a zero-day to seize control of the appliances and evade detection

Threat actor "Velvet Ant" has been exploiting a vulnerability in Cisco's NX-OS Software for managing a variety of switches, executing commands and dropping custom malware.

Cisco has patched a zero-day vulnerability exploited by a Chinese APT group to compromise Nexus switches

UNC5325 Can Remain in Hacked Devices Despite Factory Reset and PatchesChinese threat actors are continuing to persist after exploiting the recent Ivanti Connect Secure VPN vulnerability even after factory resets, system upgrades and patches. The threat actor, UNC5325, is adept at "living off the land" techniques, warned threat intelligence firm Mandiant.

Company Starts Patch Rollout for Flaws Exploited by Likely Chinese Intelligence OpCorporate VPN maker Ivanti on Wednesday began a belated patch rollout for zero-day flaws that many cybersecurity firms say paved the way for an espionage hacking operation likely conducted by China. Ivanti also disclosed two more zero-days and told customers that hackers are exploiting one of them.

Anyone who hasn't mitigated two zero-day security bugs in Ivanti VPNs may already be compromised by a Chinese nation-state actor.

Network and email security firm Barracuda says it remotely patched all active Email Security Gateway (ESG) appliances on December 21 against a zero-day bug exploited by UNC4841 Chinese hackers. [...]

A suspected China-nexus threat actor dubbed UNC4841 has been linked to the exploitation of a recently patched zero-day flaw in Barracuda Email Security Gateway (ESG) appliances since October 2022