CVE Tools
Sign in

CVE-2025-20393

Cisco Secure Email Gateway and Cisco Secure Email and Web Manager Remote Command Execution Vulnerability

Published: Dec 17, 2025Updated: Jan 16, 2026 Sources: CVE List NVD BDUCWE-20
10.0CRITICAL
NVD MITRE
EPSS Score
29.5%
Top 2.0%
CISA KEV
Active Exploitation
Since Dec 17, 2025
Exploits
0 Known
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-20

Affected Products

Cisco Systems Inc.
commercial·USaka cisco, cisco systems
AsyncOS
Networking Infrastructure
Cisco Secure Email and Web Manager
Networking Infrastructure
Cisco Secure Email Gateway
Networking Infrastructure
Secure Email and Web Manager Virtual Appliance
Networking Infrastructure
Secure Email Gateway Virtual Appliance
Networking Infrastructure
Cisco Secure Email
Networking Infrastructure
and 2 more affected products View all →

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Dec 17, 2025
Remediation due:Dec 24, 2025

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.

0 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
Is your org exposed to CVE-2025-20393?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sma-attack-N9bf4
sec.cloudapps.cisco.com
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-20393
cisa.gov

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2025-20393 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows