What’s Vulnerable › Vulnerabilities
CVE-2024-20390: Cisco IOS XR Software Dedicated XML Agent TCP Denial of Service Vulnerability
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2024-09-11 · updated 2026-06-17
- Weakness: CWE-940
Description
A vulnerability in the Dedicated XML Agent feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) on XML TCP listen port 38751. This vulnerability is due to a lack of proper error validation of ingress XML packets. An attacker could exploit this vulnerability by sending a sustained, crafted stream of XML traffic to a targeted device. A successful exploit could allow the attacker to cause XML TCP port 38751 to become unreachable while the attack traffic persists.
Affected products
- Cisco IOS XR Software: before 24.1.2 — fixed in 24.1.2
How to fix
Upgrade to a fixed version: Cisco IOS XR Software 24.1.2. Check the vendor advisory for mitigations.
References
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