CVE-2026-20263
Cisco IOS XE Software Blocks Extensible Exchange Protocol Denial of Service Vulnerability
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.
Weakness: CWE-388
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco IOS XE Software | Routing & Switching | cna-assigner |
Vendor-reported products (1)
- Cisco · Cisco IOS XE Software
Vendor advisory
Cisco IOS XE Software Blocks Extensible Exchange Protocol Denial of Service Vulnerability
Cisco’s rating: High (advisory CVSS 8.6) · Published Aug 5, 2026
Bug ID: CSCwu46548
The vendor’s rating applies to the whole advisory and can differ from this CVE’s own CVSS severity. Where this comes from