CVE-2024-20390: Cisco IOS XR

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

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: before 24.1.2 (fixed in 24.1.2)

Published 2024-09-11. Last modified 2026-06-17.