Cisco disclosed that a China-linked hacking group exploited a previously unknown vulnerability in its email security products, allowing attackers to compromise systems that sit at the center of ...

Cisco said it discovered a Chinese hacking campaign targeting its customers by exploiting a zero-day in some of the company's most popular products.

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 ...

“There are no workarounds identified that directly mitigate the risk concerning this attack campaign,” is not what you want to read, having just been informed of a zero-day exploit concerning a Common ...

The unpatched flaw affects AsyncOS-based Secure Email appliances, with Cisco investigating scope and urging rebuilds in confirmed compromise cases. Cisco has warned that a China-linked hacking group ...

Cisco confirms zero‑day (CVE‑2025‑20393) in Secure Email appliances exploited by China‑linked actors Attackers deployed Aquashell backdoor, tunneling tools, and log‑clearing utilities for persistence ...

Cisco's trusted security reputation is being used against users as part of an email phishing scheme. According to email security firm Raven AI, attackers have weaponized Cisco Safe Links, a feature ...

A novel way to abuse a decades-old protocol used to send emails since the beginning of the Internet allows attackers to evade Domain-based Message Authentication, Reporting and Conformance (DMARC) and ...

New vulnerabilities found in Cisco internal testing allow remote access and scripting that could lead to the loss of sensitive user data. Cisco has issued alerts for a vulnerability found in its email ...

Security researchers have found inconsistencies in how some Simple Mail Transfer Protocol (SMTP) servers handle end-of-data sequences. This allows the injection of SMTP commands into email messages in ...