CVE-2026-20156 (GCVE-0-2026-20156)
Vulnerability from cvelistv5 – Published: 2026-07-15 16:17 – Updated: 2026-07-15 18:05
VLAI
EPSS
VEX
Title
Cisco RoomOS Security Hardening Release - Buffer Management Vulnerabilities
Summary
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco RoomOS engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.
The vulnerabilities tracked by CVE-2026-20156 are related to improper restriction of operations within the bounds of a memory buffer that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-119.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco RoomOS Software |
Affected:
RoomOS 10.11.2.2
Affected: RoomOS 10.15.2.2 Affected: RoomOS 11.5.4.6 Affected: RoomOS 11.5.2.4 Affected: RoomOS 10.8.2.5 Affected: RoomOS 10.11.5.2 Affected: RoomOS 10.11.3.0 Affected: RoomOS 10.15.5.3 Affected: RoomOS 10.19.2.2 Affected: RoomOS 11.1.3.1 Affected: RoomOS 10.11.6.0 Affected: RoomOS 10.19.3.0 Affected: RoomOS 10.19.4.2 Affected: RoomOS 10.3.2.4 Affected: RoomOS 10.3.4.0 Affected: RoomOS 10.15.3.0 Affected: RoomOS 11.1.4.1 Affected: RoomOS 11.14.2.3 Affected: RoomOS 11.1.2.4 Affected: RoomOS 10.8.3.1 Affected: RoomOS 11.14.2.1 Affected: RoomOS 10.3.3.0 Affected: RoomOS 10.8.4.0 Affected: RoomOS 10.15.4.1 Affected: RoomOS 10.19.5.6 Affected: RoomOS 10.11.4.1 Affected: RoomOS 11.9.3.1 Affected: RoomOS 11.5.3.3 Affected: RoomOS 10.3.2.0 Affected: RoomOS 11.9.2.4 Affected: RoomOS 11.14.3.0 Affected: RoomOS 11.17.2.2 Affected: RoomOS 11.14.4.0 Affected: RoomOS 10.19 StepUpg Affected: RoomOS 11.17.3.0 Affected: RoomOS 11.20.2.3 Affected: RoomOS 11.14.5.0 Affected: RoomOS 11.17.4.0 Affected: RoomOS 11.20.3.0 Affected: RoomOS 11.23.1.6 Affected: RoomOS 11.23.1.8 Affected: RoomOS 11.24.1.5 Affected: RoomOS 11.24.2.4 Affected: RoomOS 11.24.3.0 Affected: RoomOS 11.24.4.1 Affected: RoomOS 11.27.2.0 Affected: RoomOS 11.28.1.3 Affected: RoomOS 11.27.3.0 Affected: RoomOS 11.31.1.5 Affected: RoomOS 11.27.4.0 Affected: RoomOS 11.32.2.1 Affected: RoomOS 11.33.1.7 Affected: RoomOS 26.0.1.2 Affected: RoomOS 11.34.1.2 Affected: RoomOS 11.32.3.0 Affected: RoomOS 11.27.5.0 Affected: RoomOS 11.32.4.0 Affected: RoomOS 26.1.1.5 Affected: RoomOS 11.35.1.2 Affected: RoomOS 26.2.2.2 Affected: RoomOS 11.32.5.1 Affected: RoomOS 26.4.1.6 Affected: RoomOS 26.4.1.4 Affected: RoomOS 26.3.1.3 Affected: RoomOS 11.36.1.1 Affected: RoomOS 11.37.1.0 Affected: RoomOS 26.5.2.0 Affected: RoomOS 11.38.1.1 |
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\"version\": \"RoomOS 10.11.6.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 10.19.3.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 10.19.4.2\"}, {\"status\": \"affected\", \"version\": \"RoomOS 10.3.2.4\"}, {\"status\": \"affected\", \"version\": \"RoomOS 10.3.4.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 10.15.3.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.1.4.1\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.14.2.3\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.1.2.4\"}, {\"status\": \"affected\", \"version\": \"RoomOS 10.8.3.1\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.14.2.1\"}, {\"status\": \"affected\", \"version\": \"RoomOS 10.3.3.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 10.8.4.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 10.15.4.1\"}, {\"status\": \"affected\", \"version\": \"RoomOS 10.19.5.6\"}, {\"status\": \"affected\", \"version\": \"RoomOS 10.11.4.1\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.9.3.1\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.5.3.3\"}, {\"status\": \"affected\", \"version\": \"RoomOS 10.3.2.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.9.2.4\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.14.3.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.17.2.2\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.14.4.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 10.19 StepUpg\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.17.3.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.20.2.3\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.14.5.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.17.4.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.20.3.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.23.1.6\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.23.1.8\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.24.1.5\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.24.2.4\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.24.3.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.24.4.1\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.27.2.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.28.1.3\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.27.3.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.31.1.5\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.27.4.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.32.2.1\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.33.1.7\"}, {\"status\": \"affected\", \"version\": \"RoomOS 26.0.1.2\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.34.1.2\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.32.3.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.27.5.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.32.4.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 26.1.1.5\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.35.1.2\"}, {\"status\": \"affected\", \"version\": \"RoomOS 26.2.2.2\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.32.5.1\"}, {\"status\": \"affected\", \"version\": \"RoomOS 26.4.1.6\"}, {\"status\": \"affected\", \"version\": \"RoomOS 26.4.1.4\"}, {\"status\": \"affected\", \"version\": \"RoomOS 26.3.1.3\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.36.1.1\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.37.1.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 26.5.2.0\"}, {\"status\": \"affected\", \"version\": \"RoomOS 11.38.1.1\"}], \"defaultStatus\": \"unknown\"}], \"exploits\": [{\"lang\": \"en\", \"value\": \"The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.\"}], \"references\": [{\"url\": \"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-roomos-AqNMbEq\", \"name\": \"cisco-sa-hardening-roomos-AqNMbEq\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"As part of Cisco\u0027s ongoing commitment to proactive security and product quality, the Cisco RoomOS engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.\\r\\n\\r\\nThe vulnerabilities tracked by CVE-2026-20156 are related to improper restriction of operations within the bounds of a memory buffer that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-119.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"cwe\", \"cweId\": \"CWE-119\", \"description\": \"Improper Restriction of Operations within the Bounds of a Memory Buffer\"}]}], \"providerMetadata\": {\"orgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"shortName\": \"cisco\", \"dateUpdated\": \"2026-07-15T16:17:52.307Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-20156\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-15T18:05:46.644Z\", \"dateReserved\": \"2025-10-08T11:59:15.387Z\", \"assignerOrgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"datePublished\": \"2026-07-15T16:17:52.307Z\", \"assignerShortName\": \"cisco\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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