CVE-2025-20153: Cisco ESA mail Bypass
Description
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.
Classification
CVE ID: CVE-2025-20153
CVSS Base Severity: MEDIUM
CVSS Base Score: 5.8
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Affected Products
Vendor: Cisco
Product: Cisco Secure Email
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.03% (probability of being exploited)
EPSS Percentile: 5.73% (scored less or equal to compared to others)
EPSS Date: 2025-03-20 (when was this score calculated)