CVE-2025-2039310.0CriticalCWE-20

CVE-2025-20393: Cisco Secure Email Gateway and Cisco Secure Email and Web Manager Remote Command Execution Vulnerability

Cisco · Cisco Secure Email

Affected: Cisco Secure Email · Exploitation: in CISA KEV since 17 Dec 2025

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

ExploitationIn CISA KEV

In CISA KEVCISA KEV catalogue17 Dec 2025
Exploited (reported): not seen
Scanning observed: not seen
Proof of concept public: not seen
Not established: not seen

32.4%probability of exploitation in the next 30 days

98th percentile

050100

Higher than 98% of scored CVEs

10.0CriticalCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

A vulnerability in the Spam Quarantine feature of Cisco AsyncOS Software for Cisco Secure Email Gateway and Cisco Secure Email and Web Manager could allow an unauthenticated, remote attacker to execute arbitrary system commands on an affected device with root privileges. This vulnerability is due to insufficient validation of HTTP requests by the Spam Quarantine feature. An attacker could exploit this vulnerability by sending a crafted HTTP request to the affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system with root privileges.

Affected products2

From the CVE record. A product or version that is not listed is unknown, not unaffected.

Cisco · Cisco Secure Email14.0.0-698; 13.5.1-277; 13.0.0-392; 14.2.0-620; 13.0.5-007; 13.5.4-038 and 12 more
Cisco · Cisco Secure Email and Web Manager13.6.2-023; 13.6.2-078; 13.0.0-249; 13.0.0-277; 13.8.1-052; 13.8.1-068 and 20 more

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalogue.
CISA KEV: Listed since 17 Dec 2025 · catalogue entry
Public check: No public nuclei template
Weakness: Improper Input Validation · Input Validation and Logic
Vendor: Cisco
Published: December 2025
Band: Exploited in the wild, December 2025

What changed

17 Dec 2025
CISA added it to the KEV catalogue CISA

CoverageNo articles yet

No CyberSIXT article names CVE-2025-20393 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.