FKIE_CVE-2026-20156
Vulnerability from fkie_nvd - Published: 2026-07-15 17:16 - Updated: 2026-08-14 21:17
Severity
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| cisco | roomos | * | |
| cisco | roomos | * | |
| cisco | roomos_cloud | * | |
| cisco | roomos_cloud | * |
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unknown",
"product": "Cisco RoomOS Software",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "RoomOS 10.11.2.2"
},
{
"status": "affected",
"version": "RoomOS 10.15.2.2"
},
{
"status": "affected",
"version": "RoomOS 11.5.4.6"
},
{
"status": "affected",
"version": "RoomOS 11.5.2.4"
},
{
"status": "affected",
"version": "RoomOS 10.8.2.5"
},
{
"status": "affected",
"version": "RoomOS 10.11.5.2"
},
{
"status": "affected",
"version": "RoomOS 10.11.3.0"
},
{
"status": "affected",
"version": "RoomOS 10.15.5.3"
},
{
"status": "affected",
"version": "RoomOS 10.19.2.2"
},
{
"status": "affected",
"version": "RoomOS 11.1.3.1"
},
{
"status": "affected",
"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"
}
]
}
],
"source": "psirt@cisco.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:cisco:roomos:*:*:*:*:*:*:*:*",
"matchCriteriaId": "2DAB6FC3-5699-48C7-9CCE-81F9BF3811F2",
"versionEndExcluding": "11.32.6.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:roomos:*:*:*:*:*:*:*:*",
"matchCriteriaId": "B625A5DE-98DE-44D5-9044-939413A66689",
"versionEndExcluding": "26.5.2.2",
"versionStartIncluding": "26.0.1.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:roomos_cloud:*:*:*:*:*:*:*:*",
"matchCriteriaId": "AC956F89-2FDE-4CD9-838A-8CF133177236",
"versionEndExcluding": "11.39.1.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:cisco:roomos_cloud:*:*:*:*:*:*:*:*",
"matchCriteriaId": "4A01FB2F-C564-428C-912C-175920AEF60C",
"versionEndExcluding": "26.7.1.7",
"versionStartIncluding": "26.0.1.2",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"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."
}
],
"id": "CVE-2026-20156",
"lastModified": "2026-08-14T21:17:12.917",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.2,
"impactScore": 5.9,
"source": "psirt@cisco.com",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-20156",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-15T18:05:33.626503Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-07-15T17:16:47.380",
"references": [
{
"source": "psirt@cisco.com",
"tags": [
"Vendor Advisory"
],
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-roomos-AqNMbEq"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification"
}
],
"sourceIdentifier": "psirt@cisco.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-119"
}
],
"source": "psirt@cisco.com",
"type": "Secondary"
}
]
}
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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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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