CVE-2026-20263
An attacker can exploit multiple vulnerabilities in Cisco IOS XE to execute arbitrary code, bypass security measures, disclose confidential information, manipulate data, or trigger a denial of service condition.
CSIRTS triage
- What
- Multiple vulnerabilities enable arbitrary code execution, security bypass, information disclosure, data manipulation, and denial of service.
- Who is affected
- Devices running vulnerable Cisco IOS XE versions.
- Urgency
- High severity with multiple attack vectors including unauthenticated code execution requires immediate patching.
- Action
- Consult Cisco security advisories for affected IOS XE releases and deploy patches urgently.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.33% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 25% of all EPSS-scored CVEs.
Advisory coverage (6)
- high[NEW] [high] Cisco IOS XE: Multiple Vulnerabilitiescert-bund · 2026-08-06
- unknownCisco Products Multiple Vulnerabilitieshkcert · 2026-08-06
- unknownMultiple vulnerabilities in Cisco products (August 6, 2026)cert-fr-avis · 2026-08-06
- highCVE-2026-20263: A vulnerability in the Blocks Extensible Exchange Protocol (BEEP) feature of Cisco IOS XE Soft…nvd · 2026-08-05
- criticalCisco Advance Notification for Publication of August 5, 2026, Security Advisoriescisco-psirt · 2026-08-05
- highCisco IOS XE Software Blocks Extensible Exchange Protocol Denial of Service Vulnerabilitycisco-psirt · 2026-08-05
External references
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