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Cisco finally patched a maximum-severity AsyncOS zero-day exploited in attacks targeting Secure Email Gateway (SEG) appliances since November 2025. [...]
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.…
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. [...]
Zimbra Patched the Cross-Site Scripting Vulnerability on July 25A zero-day flaw in the Zimbra Collaboration email server proved to be a bonanza for hackers as four distinct threat actors exploited the bug to steal email data and user credentials, says Google. Most of the exploit activity occurred after Zimbra had posted a hotfix on July 5.
Mozilla released emergency security updates today to fix a critical zero-day vulnerability exploited in the wild, impacting its Firefox web browser and Thunderbird email client. [...]
CISA says new malware known as Submarine was used to backdoor Barracuda ESG (Email Security Gateway) appliances by exploiting a now-patched zero-day bug. [...]
Two weeks after the initial disclosure, Zimbra has released security updates that patch a zero-day vulnerability exploited in attacks targeting Zimbra Collaboration Suite (ZCS) email servers. [...]
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
A suspected pro-China hacker group tracked by Mandiant as UNC4841 has been linked to data-theft attacks on Barracuda ESG (Email Security Gateway) appliances using a now-patched zero-day vulnerability. [...]
Enterprise security company Barracuda is now urging customers who were impacted by a recently disclosed zero-day flaw in its Email Security Gateway (ESG) appliances to immediately replace them
Email and network security company Barracuda warns customers they must replace Email Security Gateway (ESG) appliances hacked in attacks targeting a now-patched zero-day vulnerability. [...]
Enterprise security firm Barracuda on Tuesday disclosed that a recently patched zero-day flaw in its Email Security Gateway (ESG) appliances had been abused by threat actors since October 2022 to backdoor the devices
Network and email security firm Barracuda today revealed that a recently patched zero-day vulnerability had been exploited for at least seven months to backdoor customers' Email Security Gateway (ESG) appliances with custom malware and steal data. [...]
CISA warned of a recently patched zero-day vulnerability exploited last week to hack into Barracuda Email Security Gateway (ESG) appliances. [...]
Barracuda, a company known for its email and network security solutions, warned customers today that some of their Email Security Gateway (ESG) appliances were breached last week by targeting a now-patched zero-day vulnerability. [...]
Microsoft Corp. is investigating reports that attackers are exploiting two previously unknown vulnerabilities in Exchange Server, a technology many organizations rely on to send and receive email. Microsoft says it is expediting work on software patches to plug the security holes. In the meantime, it is urging a subset of Exchange customers to enable a setting that could help mitigate ongoing attacks.
Microsoft today released updates to fix a record 141 security vulnerabilities in its Windows operating systems and related software. Once again, Microsoft is patching a zero-day vulnerability in the Microsoft Support Diagnostics Tool (MSDT), a service built into Windows. Redmond also addressed multiple flaws in Exchange Server — including one that was disclosed publicly prior to today — and it is urging organizations that use Exchange for email to update as soon as possible and to enable additional protections.
Twitter on Friday revealed that a now-patched zero-day bug was used to link phone numbers and emails to user accounts on the social media platform
Twitter has confirmed a recent data breach was caused by a now-patched zero-day vulnerability used to link email addresses and phone numbers to users' accounts, allowing a threat actor to compile a list of 5.4 million user account profiles. [...]