Detection engine restart via unchecked MIME parsing
Published Oct 15, 2025 · Updated Feb 12, 2026
Denial of service in Cisco products using Snort 3 allows remote attackers to restart the detection engine via crafted MIME headers. The HTTP decoder incompletely checks errors while parsing MIME fields in HTTP headers, so crafted packets on an established connection trigger an unexpected engine restart. Exploitation is unauthenticated but requires traffic to traverse an affected inspection path with Snort 3 active; the resulting interruption is limited to the detection engine restart.
Summary
What happened
Denial of service in Cisco products using Snort 3 allows remote attackers to restart the detection engine via crafted MIME headers. The HTTP decoder incompletely checks errors while parsing MIME fields in HTTP headers, so crafted packets on an established connection trigger an unexpected engine restart. Exploitation is unauthenticated but requires traffic to traverse an affected inspection path with Snort 3 active; the resulting interruption is limited to the detection engine restart.
The record
- CVE
- CVE-2025-20360
- Published
- Oct 15, 2025
- Updated
- Feb 12, 2026
- Vendor
- ClamAV
- Product
- Cisco Cyber Vision
- Classifications
- CWE-805, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 15, 2025CVE publishedPublication date reported by the CVE source.
- Feb 12, 2026Record 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=3.0.0
- Affected versionversion=3.0.1
- Affected versionversion=3.0.2
- Affected versionversion=3.0.3
- Affected versionversion=3.0.4
- Affected versionversion=3.0.5
- Affected versionversion=3.0.6
- Affected versionversion=3.1.0
- Affected versionversion=3.1.1
- Affected versionversion=3.1.2
- Affected versionversion=3.2.0
- Affected versionversion=3.2.1
- Affected versionversion=3.2.2
- Affected versionversion=3.2.3
- Affected versionversion=3.2.4
- Affected versionversion=4.0.0
- Affected versionversion=4.0.1
- Affected versionversion=4.0.2
- Affected versionversion=4.0.3
- Affected versionversion=4.1.0
- Affected versionversion=4.1.1
- Affected versionversion=4.1.2
- Affected versionversion=4.1.3
- Affected versionversion=4.1.4
- Affected versionversion=4.1.5
- Affected versionversion=4.1.6
- Affected versionversion=4.1.7
- Affected versionversion=4.2.0
- Affected versionversion=4.2.1
- Affected versionversion=4.2.2
- Affected versionversion=4.2.3
- Affected versionversion=4.2.4
- Affected versionversion=4.2.6
- Affected versionversion=4.2.X
- Affected versionversion=4.3.0
- Affected versionversion=4.3.1
- Affected versionversion=4.3.2
- Affected versionversion=4.3.3
- Affected versionversion=4.4.0
- Affected versionversion=4.4.1
- Affected versionversion=4.4.2
- Affected versionversion=4.4.3
- Affected versionversion=5.0.0
- Affected versionversion=5.0.1
- Affected versionversion=5.0.2
- Affected versionversion=5.1.0
- Affected versionversion=5.1.1
- Affected versionversion=5.1.2
- Affected versionversion=5.1.3
- Affected versionversion=5.2.0
- Affected versionversion=5.2.1
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.
Weakness, pattern, technique
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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