What’s Vulnerable › Vulnerabilities
CVE-2026-20263: Cisco IOS XE Software Blocks Extensible Exchange Protocol Denial of Service Vulnerability
- Severity: high (CVSS 8.6 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-05 · updated 2026-10-23
- Weakness: CWE-388
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.
Affected products
- Cisco IOS XE: 16.6.2, 16.6.3, 16.6.4, 16.6.4a, 16.6.4s, 16.6.5 (+261)
References
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