CVE-2026-20263 - Vulnerability Details

A vulnerability in the Blocks Extensible Exchange Protocol (BEEP) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.

This vulnerability is due to improper handling when parsing a specific BEEP SOAP request. An attacker could exploit this vulnerability by sending a specific BEEP SOAP request to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00327.

Exploitation none

Automatable yes

Technical Impact partial

Vendors	Products
Cisco Subscribe	Ios Xe Software Subscribe

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors	Products
Cisco Subscribe	Ios Xe Software Subscribe

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-bing-MGHrFAkd

History

Fri, 07 Aug 2026 09:30:00 +0000

Type	Values Removed	Values Added
First Time appeared		Cisco Cisco ios Xe Software
Vendors & Products		Cisco Cisco ios Xe Software

Wed, 05 Aug 2026 18:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Wed, 05 Aug 2026 17:00:00 +0000

Type	Values Removed	Values Added
Description		A vulnerability in the Blocks Extensible Exchange Protocol (BEEP) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling when parsing a specific BEEP SOAP request. An attacker could exploit this vulnerability by sending a specific BEEP SOAP request to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition.
Title		Cisco IOS XE Software Blocks Extensible Exchange Protocol Denial of Service Vulnerability
Weaknesses		CWE-388
References		https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-bing-MGHrFAkd
Metrics		cvssV3_1 `{'score': 8.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: cisco

Published: 2026-08-05T16:18:33.458Z

Updated: 2026-08-05T17:45:15.473Z

Reserved: 2025-10-08T11:59:15.402Z

Link: CVE-2026-20263

Vulnrichment

Updated: 2026-08-05T17:39:26.566Z

NVD

Status : Awaiting Analysis

Published: 2026-08-05T17:16:47.310

Modified: 2026-08-06T15:44:56.043

Link: CVE-2026-20263

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-08-07T09:15:07Z

Weaknesses

CWE-388

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"version": "17.12.5b"}, {"status": "affected", "version": "17.15.3b"}, {"status": "affected", "version": "16.12.14"}, {"status": "affected", "version": "17.18.1z"}, {"status": "affected", "version": "17.9.7b"}, {"status": "affected", "version": "17.12.5c"}, {"status": "affected", "version": "26.1.1"}, {"status": "affected", "version": "17.18.1a"}, {"status": "affected", "version": "17.15.4a"}, {"status": "affected", "version": "17.18.2"}, {"status": "affected", "version": "17.18.1w"}, {"status": "affected", "version": "17.15.4b"}, {"status": "affected", "version": "17.12.6a"}, {"status": "affected", "version": "17.12.7"}, {"status": "affected", "version": "17.15.4c"}, {"status": "affected", "version": "17.9.9"}, {"status": "affected", "version": "17.12.5d"}, {"status": "affected", "version": "16.12.15"}, {"status": "affected", "version": "17.15.4s1"}, {"status": "affected", "version": "17.15.5"}, {"status": "affected", "version": "17.12.1z5"}, {"status": "affected", "version": "17.18.1x"}, {"status": "affected", "version": "17.12.1z6"}, {"status": "affected", "version": "17.15.4d"}, {"status": "affected", "version": "17.12.6b"}, {"status": "affected", "version": "17.4.1c"}, {"status": "affected", "version": "17.15.5a"}, {"status": "affected", "version": "17.18.1y"}, {"status": "affected", "version": "17.12.7a"}, {"status": "affected", "version": "17.18.3"}, {"status": "affected", "version": "17.12.7b"}, {"status": "affected", "version": "17.18.3a"}, {"status": "affected", "version": "26.1.1a"}, {"status": "affected", "version": "26.2.1ea"}], "defaultStatus": "unknown"}], "exploits": [{"lang": "en", "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."}], "references": [{"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-bing-MGHrFAkd", "name": "cisco-sa-iosxe-bing-MGHrFAkd"}], "descriptions": [{"lang": "en", "value": "A vulnerability in the Blocks Extensible Exchange Protocol (BEEP) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.\r\n\r\nThis vulnerability is due to improper handling when parsing a specific BEEP SOAP request. An attacker could exploit this vulnerability by sending a specific BEEP SOAP request to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "cwe", "cweId": "CWE-388", "description": "Error Handling"}]}], "providerMetadata": {"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "shortName": "cisco", "dateUpdated": "2026-08-05T16:18:33.458Z"}}}, "cveMetadata": {"cveId": "CVE-2026-20263", "state": "PUBLISHED", "dateUpdated": "2026-08-05T17:45:15.473Z", "dateReserved": "2025-10-08T11:59:15.402Z", "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "datePublished": "2026-08-05T16:18:33.458Z", "assignerShortName": "cisco"}, "dataVersion": "5.2"}

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{"status": "affected", "version": "16.12.14"}, {"status": "affected", "version": "17.18.1z"}, {"status": "affected", "version": "17.9.7b"}, {"status": "affected", "version": "17.12.5c"}, {"status": "affected", "version": "26.1.1"}, {"status": "affected", "version": "17.18.1a"}, {"status": "affected", "version": "17.15.4a"}, {"status": "affected", "version": "17.18.2"}, {"status": "affected", "version": "17.18.1w"}, {"status": "affected", "version": "17.15.4b"}, {"status": "affected", "version": "17.12.6a"}, {"status": "affected", "version": "17.12.7"}, {"status": "affected", "version": "17.15.4c"}, {"status": "affected", "version": "17.9.9"}, {"status": "affected", "version": "17.12.5d"}, {"status": "affected", "version": "16.12.15"}, {"status": "affected", "version": "17.15.4s1"}, {"status": "affected", "version": "17.15.5"}, {"status": "affected", "version": "17.12.1z5"}, {"status": "affected", "version": "17.18.1x"}, {"status": "affected", "version": "17.12.1z6"}, {"status": "affected", "version": "17.15.4d"}, {"status": "affected", "version": "17.12.6b"}, {"status": "affected", "version": "17.4.1c"}, {"status": "affected", "version": "17.15.5a"}, {"status": "affected", "version": "17.18.1y"}, {"status": "affected", "version": "17.12.7a"}, {"status": "affected", "version": "17.18.3"}, {"status": "affected", "version": "17.12.7b"}, {"status": "affected", "version": "17.18.3a"}, {"status": "affected", "version": "26.1.1a"}, {"status": "affected", "version": "26.2.1ea"}]}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability in the Blocks Extensible Exchange Protocol (BEEP) feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.\r\n\r\nThis vulnerability is due to improper handling when parsing a specific BEEP SOAP request. An attacker could exploit this vulnerability by sending a specific BEEP SOAP request to an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition."}], "id": "CVE-2026-20263", "lastModified": "2026-08-06T15:44:56.043", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.0, "source": "[email protected]", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-20263", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-05T17:31:04.401885Z", "version": "2.0.3"}}]}, "published": "2026-08-05T17:16:47.310", "references": [{"source": "[email protected]", "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-bing-MGHrFAkd"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-388"}], "source": "[email protected]", "type": "Secondary"}]}

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"versions": {"scheme": "generic", "value": "17.12.5a"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "17.18.1"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "17.12.6"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "17.12.1z4"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "17.9.8"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "17.9.7a"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "17.15.3a"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "17.15.4"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "17.12.5b"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "17.15.3b"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "16.12.14"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "17.18.1z"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "17.9.7b"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "17.12.5c"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "26.1.1"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "17.18.1a"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "17.15.4a"}}], "enrichment": {"confidence": 88.0, "confidence_source": "matching", "scores": [{"score": 88.0, "source": "matching"}]}, "original": {"product": "Cisco IOS XE Software", "source": "cna", "vendor": "Cisco"}, "product": "ios_xe_software", "vendor": "cisco"}], "created": "2026-08-05T19:00:05.191768+00:00", "updated": "2026-08-07T09:15:07.159342+00:00", "vendors": ["cisco", "cisco$PRODUCT$ios_xe_software"]}

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

Exploitation none

Automatable yes

Technical Impact partial

Affected Vendors & Products

Projects

JSON object

JSON object

JSON object

JSON object

JSON object