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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. [...]
A vulnerability in DoorDash's systems could allow anyone to send "official" DoorDash-themed emails right from company's authorized servers, paving a near-perfect phishing channel. DoorDash has now patched the issue, but a contentious disclosure dispute has erupted, with both sides accusing each other of acting in bad faith. [...]
Microsoft has paused the November 2024 Exchange security updates released during this month's Patch Tuesday because of email delivery issues on servers using custom mail flow rules. [...]
CISA warns that a Roundcube email server vulnerability patched in September is now actively exploited in cross-site scripting (XSS) attacks. [...]
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. [...]
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. [...]
The Federal Bureau of Investigation warned that patches for a critical Barracuda Email Security Gateway (ESG) remote command injection flaw are "ineffective," and patched appliances are still being compromised in ongoing attacks. [...]
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 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. [...]
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. [...]
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. [...]
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. [...]
Cisco notified customers this week to patch a critical vulnerability that could allow attackers to bypass authentication and login into the web management interface of Cisco email gateway appliances with non-default configurations. [...]