Device denial of service via exceptional conditions
Published Jul 15, 2026 · Updated Jul 15, 2026
Improper exceptional-condition handling in Cisco RoomOS allows remote attackers to interrupt affected devices through network requests. Cisco has not disclosed the affected subsystems or the inputs that trigger uncaught exceptions or reachable assertions. No authentication, user interaction, or nondefault configuration is required, and the documented consequence is device unavailability rather than data access or modification.
Summary
What happened
Improper exceptional-condition handling in Cisco RoomOS allows remote attackers to interrupt affected devices through network requests. Cisco has not disclosed the affected subsystems or the inputs that trigger uncaught exceptions or reachable assertions. No authentication, user interaction, or nondefault configuration is required, and the documented consequence is device unavailability rather than data access or modification.
The record
- CVE
- CVE-2026-20187
- Published
- Jul 15, 2026
- Updated
- Jul 15, 2026
- Vendor
- ClamAV
- Product
- Cisco RoomOS
- Classifications
- CWE-703, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 15, 2026CVE publishedPublication date reported by the CVE source.
- Jul 15, 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=RoomOS 10.11.2.2
- Affected versionversion=RoomOS 10.11.3.0
- Affected versionversion=RoomOS 10.11.4.1
- Affected versionversion=RoomOS 10.11.5.2
- Affected versionversion=RoomOS 10.11.6.0
- Affected versionversion=RoomOS 10.15.2.2
- Affected versionversion=RoomOS 10.15.3.0
- Affected versionversion=RoomOS 10.15.4.1
- Affected versionversion=RoomOS 10.15.5.3
- Affected versionversion=RoomOS 10.19.2.2
- Affected versionversion=RoomOS 10.19.3.0
- Affected versionversion=RoomOS 10.19.4.2
- Affected versionversion=RoomOS 10.19.5.6
- Affected versionversion=RoomOS 10.19 StepUpg
- Affected versionversion=RoomOS 10.3.2.0
- Affected versionversion=RoomOS 10.3.2.4
- Affected versionversion=RoomOS 10.3.3.0
- Affected versionversion=RoomOS 10.3.4.0
- Affected versionversion=RoomOS 10.8.2.5
- Affected versionversion=RoomOS 10.8.3.1
- Affected versionversion=RoomOS 10.8.4.0
- Affected versionversion=RoomOS 11.1.2.4
- Affected versionversion=RoomOS 11.1.3.1
- Affected versionversion=RoomOS 11.1.4.1
- Affected versionversion=RoomOS 11.14.2.1
- Affected versionversion=RoomOS 11.14.2.3
- Affected versionversion=RoomOS 11.14.3.0
- Affected versionversion=RoomOS 11.14.4.0
- Affected versionversion=RoomOS 11.14.5.0
- Affected versionversion=RoomOS 11.17.2.2
- Affected versionversion=RoomOS 11.17.3.0
- Affected versionversion=RoomOS 11.17.4.0
- Affected versionversion=RoomOS 11.20.2.3
- Affected versionversion=RoomOS 11.20.3.0
- Affected versionversion=RoomOS 11.23.1.6
- Affected versionversion=RoomOS 11.23.1.8
- Affected versionversion=RoomOS 11.24.1.5
- Affected versionversion=RoomOS 11.24.2.4
- Affected versionversion=RoomOS 11.24.3.0
- Affected versionversion=RoomOS 11.24.4.1
- Affected versionversion=RoomOS 11.27.2.0
- Affected versionversion=RoomOS 11.27.3.0
- Affected versionversion=RoomOS 11.27.4.0
- Affected versionversion=RoomOS 11.27.5.0
- Affected versionversion=RoomOS 11.28.1.3
- Affected versionversion=RoomOS 11.31.1.5
- Affected versionversion=RoomOS 11.32.2.1
- Affected versionversion=RoomOS 11.32.3.0
- Affected versionversion=RoomOS 11.32.4.0
- Affected versionversion=RoomOS 11.32.5.1
- Affected versionversion=RoomOS 11.33.1.7
- Affected versionversion=RoomOS 11.34.1.2
- Affected versionversion=RoomOS 11.35.1.2
- Affected versionversion=RoomOS 11.36.1.1
- Affected versionversion=RoomOS 11.37.1.0
- Affected versionversion=RoomOS 11.5.2.4
- Affected versionversion=RoomOS 11.5.3.3
- Affected versionversion=RoomOS 11.5.4.6
- Affected versionversion=RoomOS 11.9.2.4
- Affected versionversion=RoomOS 11.9.3.1
- Affected versionversion=RoomOS 26.0.1.2
- Affected versionversion=RoomOS 26.1.1.5
- Affected versionversion=RoomOS 26.2.2.2
- Affected versionversion=RoomOS 26.3.1.3
- Affected versionversion=RoomOS 26.4.1.4
- Affected versionversion=RoomOS 26.4.1.6
- Affected versionversion=RoomOS 26.5.2.0
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.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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