This vulnerability is due to improper handling of malformed XMCP packets. An attacker could exploit this vulnerability by sending a malformed XMCP packet to an affected device. A successful exploit could allow the attacker to cause the affected device to reload unexpectedly, resulting in a DoS condition. The attacker does not need the XMCP client username to exploit this vulnerability.
Metrics
Affected Vendors & Products
No advisories yet.
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Fri, 07 Aug 2026 09:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Cisco
Cisco ios Cisco ios Xe Software |
|
| Vendors & Products |
Cisco
Cisco ios Cisco ios Xe Software |
Wed, 05 Aug 2026 18:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Wed, 05 Aug 2026 17:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A vulnerability in the Extensible Messaging Client Protocol (XMCP), also referred to as the External Client protocol, of Cisco IOS Software and 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 of malformed XMCP packets. An attacker could exploit this vulnerability by sending a malformed XMCP packet to an affected device. A successful exploit could allow the attacker to cause the affected device to reload unexpectedly, resulting in a DoS condition. The attacker does not need the XMCP client username to exploit this vulnerability. | |
| Title | Cisco IOS Software and IOS XE Software Extensible Messaging Client Protocol Denial of Service Vulnerability | |
| Weaknesses | CWE-606 | |
| References |
| |
| Metrics |
cvssV3_1
|
Projects
Sign in to view the affected projects.
Status: PUBLISHED
Assigner: cisco
Published:
Updated: 2026-08-05T17:45:13.376Z
Reserved: 2025-10-08T11:59:15.408Z
Link: CVE-2026-20301
Updated: 2026-08-05T17:39:00.784Z
Status : Awaiting Analysis
Published: 2026-08-05T17:16:50.187
Modified: 2026-08-06T15:44:56.043
Link: CVE-2026-20301
No data.
OpenCVE Enrichment
Updated: 2026-08-07T09:15:07Z