Unauthenticated email-filter bypass via crafted messages
Published Feb 19, 2025 · Updated Feb 19, 2025
Improper access control in Cisco Secure Email Gateway through 16.0.0-050 allows remote attackers to bypass email filters via crafted email. The email filtering mechanism improperly handles a crafted message as it passes through the gateway, causing configured deny rules not to be enforced. No authentication or user interaction is required; successful exploitation permits email that policy should deny to flow through the device.
Summary
What happened
Improper access control in Cisco Secure Email Gateway through 16.0.0-050 allows remote attackers to bypass email filters via crafted email. The email filtering mechanism improperly handles a crafted message as it passes through the gateway, causing configured deny rules not to be enforced. No authentication or user interaction is required; successful exploitation permits email that policy should deny to flow through the device.
The record
- CVE
- CVE-2025-20153
- Published
- Feb 19, 2025
- Updated
- Feb 19, 2025
- Vendor
- ClamAV
- Product
- Cisco Secure Email
- Classifications
- CWE-284, T1566
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 19, 2025CVE publishedPublication date reported by the CVE source.
- Feb 19, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=13.0.0-392
- Affected versionversion=13.0.5-007
- Affected versionversion=13.5.1-277
- Affected versionversion=13.5.4-038
- Affected versionversion=14.0.0-698
- Affected versionversion=14.2.0-620
- Affected versionversion=14.2.1-020
- Affected versionversion=14.3.0-032
- Affected versionversion=15.0.0-104
- Affected versionversion=15.0.1-030
- Affected versionversion=15.0.3-002
- Affected versionversion=15.5.0-048
- Affected versionversion=15.5.1-055
- Affected versionversion=15.5.2-018
- Affected versionversion=16.0.0-050
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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