CVE-2026-20263

HIGH

Cisco IOS XE Software Blocks Extensible Exchange Protocol Denial of Service Vulnerability

Title source: cna
STIX 2.1

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.

References (1)

Core 1

Scores

CVSS v3 8.6
EPSS 0.0033
EPSS Percentile 25.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-388
Status published
Products (50)
Cisco/Cisco IOS XE Software 16.10.1
Cisco/Cisco IOS XE Software 16.10.1a
Cisco/Cisco IOS XE Software 16.10.1b
Cisco/Cisco IOS XE Software 16.10.1c
Cisco/Cisco IOS XE Software 16.10.1d
Cisco/Cisco IOS XE Software 16.10.1e
Cisco/Cisco IOS XE Software 16.10.1f
Cisco/Cisco IOS XE Software 16.10.1g
Cisco/Cisco IOS XE Software 16.10.1s
Cisco/Cisco IOS XE Software 16.10.2
... and 40 more
Published Aug 05, 2026
Tracked Since Aug 05, 2026