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CVE-2025-20153

18
FAUCET Score

CVE-2025-20153 describes a vulnerability in Cisco Secure Email Gateway's email filtering mechanism, allowing unauthenticated, remote attackers to bypass configured rules and deliver emails that should have been blocked. This flaw stems from improper email handling, enabling attackers to send crafted emails to bypass filters. With a CVSS score of 5.3 (Medium), this vulnerability has a low attack complexity and could lead to information integrity compromise, though it has no known active exploitation, public exploit code, or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
13.0.0-392CPE matchmatch criteria
cpe:2.3:a:cisco:secure_email_gateway:13.0.0-392:*:*:*:*:*:*:*
13.0.5-007CPE matchmatch criteria
cpe:2.3:a:cisco:secure_email_gateway:13.0.5-007:*:*:*:*:*:*:*
13.5.1-277CPE matchmatch criteria
cpe:2.3:a:cisco:secure_email_gateway:13.5.1-277:*:*:*:*:*:*:*
13.5.4-038CPE matchmatch criteria
cpe:2.3:a:cisco:secure_email_gateway:13.5.4-038:*:*:*:*:*:*:*
14.0.0-698CPE matchmatch criteria
cpe:2.3:a:cisco:secure_email_gateway:14.0.0-698:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.8MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.35%
Probability of exploitation in next 30 days
EPSS Percentile
27.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0035 is in the 16th percentile among its peer group of 23,723 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

sec.cloudapps.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-mailpol-bypass-5nVcJZMw
Vendor Advisory