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CVE-2025-20393

CRITICAL KEV CISA Exploitation: ACTIVE
10.0
CVSS 3.1
Description
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.

Metadata

CVE ID
CVE-2025-20393
State
PUBLISHED
Assigner
cisco
Reserved
2024-10-10 19:15 UTC
Published
2025-12-17 16:47 UTC
Last updated
2026-02-26 16:07 UTC
Primary CWE
CWE-20
Improper Input Validation
Vendor / Product
Cisco / Cisco Secure Email
Sources
cve.org  ·  NVD

Severity & Metrics

10.0 CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
ACTIVE
Automatable
yes
Tech. Impact
total
CISA Known Exploited Vulnerability
Vulnerability name
Cisco Multiple Products Improper Input Validation Vulnerability
Vendor
Cisco
Product
Multiple Products
Added to KEV
2025-12-17
Due date
2025-12-24
Ransomware
Not known
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA description
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.
Affected products (2)
VendorProductPlatformVersions
Cisco Cisco Secure Email — 14.0.0-698, 13.5.1-277, 13.0.0-392, 14.2.0-620 …
Cisco Cisco Secure Email and Web Manager — 13.6.2-023, 13.6.2-078, 13.0.0-249, 13.0.0-277 …
Weakness (CWE)
CWESourceDescription
CWE-20 cna Improper Input Validation
CVSS scores (1)
ScoreSeverityVersionSourceVector
10.0 CRITICAL 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
References (1)
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