Vulnerability in Cisco Secure Email
CVE-2025-20153
A vulnerability in the email filtering mechanism of Cisco Secure Email Gateway could allow an unauthenticated, remote attacker to bypass the configured rules and allow emails that should have been denied to flow through an affected device. This vulnerability is due to improper handling of email that passes through an affected device. An attacker could exploit this vulnerability by sending a crafted email through the affected device. A successful exploit could allow the attacker to bypass email filters on the affected device.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (27.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Cisco Secure Email — versions 14.0.0-698, 13.5.1-277, 13.0.0-392
- Cisco Secure Email Gateway — versions 13.0.0-392, 13.0.5-007, 13.5.1-277
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-20153?
- CVE-2025-20153 is a medium-severity vulnerability in Cisco Secure Email, classified under Improper Access Control. CVSS score: 5.8/10. Published 2025-02-19.
- How severe is CVE-2025-20153?
- Medium severity. CVSS v3 base score is 5.8 out of 10.