Cisco fixes AsyncOS vulnerability exploited in zero-day attacks (CVE-2025-20393)
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2025-20393 | Improper Input Validation in Cisco Secure Email and Web Appliances Allows Root Commands | 10.0 | 32% | KEV | KEV |
From the original article
2 min read at helpnetsecurity.com
Cisco has finally shipped security updates for its Email Security Gateway and Secure Email and Web Manager devices, which fix CVE-2025-20393, a vulnerability in the devices’ AsyncOS that has been exploited as a zero-day by suspected Chinese attackers since at least late November 2025.
By @zeljkazorz · helpnetsecurity.com
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