CVE-2025-20393: Cisco Multiple Products Improper Input Validation Vulnerability
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Cisco Secure Email Gateway, Secure Email, AsyncOS Software, and Web Manager appliances contains an improper input validation vulnerability that allows threat actors to execute arbitrary commands with root privileges on the underlying operating system of an affected appliance.
CSIRTS triage
- What
- This vulnerability allows threat actors to execute arbitrary commands with root privileges.
- Who is affected
- Deployments of affected Cisco appliances.
- Urgency
- Remediation is critical due to confirmed exploitation and the severity of the vulnerability.
- Action
- Update to the latest software versions as recommended by Cisco.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-20393
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation confirmedCVE-2025-20393Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 98% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2025-20393 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
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