FKIE_CVE-2026-20274
Vulnerability from fkie_nvd - Published: 2026-09-02 17:17 - Updated: 2026-09-03 13:04
Severity
Summary
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XR Software engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening releases that address multiple internally discovered vulnerabilities.
The vulnerabilities tracked by CVE-2026-20274 are related to improper resource control issues that are grouped under the Common Weakness Enumeration (CWE) CWE-664.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unknown",
"product": "Cisco IOS XR Software",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "6.5.29"
},
{
"status": "affected",
"version": "7.0.1"
},
{
"status": "affected",
"version": "6.5.26"
},
{
"status": "affected",
"version": "6.5.25"
},
{
"status": "affected",
"version": "6.5.28"
},
{
"status": "affected",
"version": "6.5.90"
},
{
"status": "affected",
"version": "7.1.1"
},
{
"status": "affected",
"version": "7.0.90"
},
{
"status": "affected",
"version": "6.7.1"
},
{
"status": "affected",
"version": "7.0.2"
},
{
"status": "affected",
"version": "7.1.15"
},
{
"status": "affected",
"version": "7.2.1"
},
{
"status": "affected",
"version": "7.1.2"
},
{
"status": "affected",
"version": "6.7.2"
},
{
"status": "affected",
"version": "7.0.11"
},
{
"status": "affected",
"version": "7.0.12"
},
{
"status": "affected",
"version": "7.0.14"
},
{
"status": "affected",
"version": "7.1.25"
},
{
"status": "affected",
"version": "7.2.12"
},
{
"status": "affected",
"version": "7.3.1"
},
{
"status": "affected",
"version": "7.1.3"
},
{
"status": "affected",
"version": "6.7.3"
},
{
"status": "affected",
"version": "7.4.1"
},
{
"status": "affected",
"version": "7.2.2"
},
{
"status": "affected",
"version": "6.7.4"
},
{
"status": "affected",
"version": "6.5.31"
},
{
"status": "affected",
"version": "7.3.15"
},
{
"status": "affected",
"version": "7.3.16"
},
{
"status": "affected",
"version": "6.8.1"
},
{
"status": "affected",
"version": "7.4.15"
},
{
"status": "affected",
"version": "6.5.32"
},
{
"status": "affected",
"version": "7.3.2"
},
{
"status": "affected",
"version": "7.5.1"
},
{
"status": "affected",
"version": "7.4.16"
},
{
"status": "affected",
"version": "7.3.27"
},
{
"status": "affected",
"version": "7.6.1"
},
{
"status": "affected",
"version": "7.5.2"
},
{
"status": "affected",
"version": "7.8.1"
},
{
"status": "affected",
"version": "7.6.15"
},
{
"status": "affected",
"version": "7.5.12"
},
{
"status": "affected",
"version": "7.8.12"
},
{
"status": "affected",
"version": "7.3.3"
},
{
"status": "affected",
"version": "7.7.1"
},
{
"status": "affected",
"version": "6.8.2"
},
{
"status": "affected",
"version": "7.3.4"
},
{
"status": "affected",
"version": "7.4.2"
},
{
"status": "affected",
"version": "6.7.35"
},
{
"status": "affected",
"version": "6.9.1"
},
{
"status": "affected",
"version": "7.6.2"
},
{
"status": "affected",
"version": "7.5.3"
},
{
"status": "affected",
"version": "7.7.2"
},
{
"status": "affected",
"version": "6.9.2"
},
{
"status": "affected",
"version": "7.9.1"
},
{
"status": "affected",
"version": "7.10.1"
},
{
"status": "affected",
"version": "7.8.2"
},
{
"status": "affected",
"version": "7.5.4"
},
{
"status": "affected",
"version": "6.5.33"
},
{
"status": "affected",
"version": "7.8.22"
},
{
"status": "affected",
"version": "7.7.21"
},
{
"status": "affected",
"version": "7.9.2"
},
{
"status": "affected",
"version": "7.3.5"
},
{
"status": "affected",
"version": "7.5.5"
},
{
"status": "affected",
"version": "7.11.1"
},
{
"status": "affected",
"version": "7.9.21"
},
{
"status": "affected",
"version": "7.10.2"
},
{
"status": "affected",
"version": "24.1.1"
},
{
"status": "affected",
"version": "7.6.3"
},
{
"status": "affected",
"version": "7.3.6"
},
{
"status": "affected",
"version": "7.5.52"
},
{
"status": "affected",
"version": "7.11.2"
},
{
"status": "affected",
"version": "24.2.1"
},
{
"status": "affected",
"version": "24.1.2"
},
{
"status": "affected",
"version": "24.2.11"
},
{
"status": "affected",
"version": "24.3.1"
},
{
"status": "affected",
"version": "24.4.1"
},
{
"status": "affected",
"version": "24.2.2"
},
{
"status": "affected",
"version": "7.8.23"
},
{
"status": "affected",
"version": "7.11.21"
},
{
"status": "affected",
"version": "24.2.20"
},
{
"status": "affected",
"version": "24.3.2"
},
{
"status": "affected",
"version": "24.4.10"
},
{
"status": "affected",
"version": "6.5.35"
},
{
"status": "affected",
"version": "25.1.1"
},
{
"status": "affected",
"version": "24.4.2"
},
{
"status": "affected",
"version": "24.3.20"
},
{
"status": "affected",
"version": "24.4.15"
},
{
"status": "affected",
"version": "25.2.1"
},
{
"status": "affected",
"version": "6.5.351"
},
{
"status": "affected",
"version": "25.1.2"
},
{
"status": "affected",
"version": "24.3.30"
},
{
"status": "affected",
"version": "25.3.1"
},
{
"status": "affected",
"version": "6.5.352"
},
{
"status": "affected",
"version": "24.4.30"
},
{
"status": "affected",
"version": "24.2.21"
},
{
"status": "affected",
"version": "25.4.1"
},
{
"status": "affected",
"version": "25.2.2"
},
{
"status": "affected",
"version": "25.2.15"
},
{
"status": "affected",
"version": "7.2.0"
},
{
"status": "affected",
"version": "7.0.0"
},
{
"status": "affected",
"version": "25.2.30"
},
{
"status": "affected",
"version": "6.5.353"
},
{
"status": "affected",
"version": "26.1.1"
},
{
"status": "affected",
"version": "25.1.30"
},
{
"status": "affected",
"version": "25.3.15"
},
{
"status": "affected",
"version": "26.2.100"
},
{
"status": "affected",
"version": "25.4.2"
},
{
"status": "affected",
"version": "26.2.1"
},
{
"status": "affected",
"version": "25.4.30"
},
{
"status": "affected",
"version": "26.1.2"
},
{
"status": "affected",
"version": "25.4.201"
},
{
"status": "affected",
"version": "26.2.101"
}
]
}
],
"source": "psirt@cisco.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "As part of Cisco\u0027s ongoing commitment to proactive security and product quality, the Cisco IOS XR Software engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening releases that address multiple internally discovered vulnerabilities.\r\n\r\nThe vulnerabilities tracked by CVE-2026-20274 are related to improper resource control issues that are grouped under the Common Weakness Enumeration (CWE) CWE-664."
}
],
"id": "CVE-2026-20274",
"lastModified": "2026-09-03T13:04:39.223",
"metrics": {
"cvssMetricV31": [
{
"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": "psirt@cisco.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-20274",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-02T00:00:00+00:00",
"version": "2.0.3"
}
}
]
},
"published": "2026-09-02T17:17:32.630",
"references": [
{
"source": "psirt@cisco.com",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-iosxr-qg64NcM"
}
],
"sourceIdentifier": "psirt@cisco.com",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-664"
}
],
"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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