CVE-2025-20154

Cisco IOS, IOS XE and IOS XR Software TWAMP Denial of Service Vulnerability

Description

A vulnerability in the Two-Way Active Measurement Protocol (TWAMP) server feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition. For Cisco IOS XR Software, this vulnerability could cause the ipsla_ippm_server process to reload unexpectedly if debugs are enabled. This vulnerability is due to out-of-bounds array access when processing specially crafted TWAMP control packets. An attacker could exploit this vulnerability by sending crafted TWAMP control packets to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: For Cisco IOS XR Software, only the ipsla_ippm_server process reloads unexpectedly and only when debugs are enabled. The vulnerability details for Cisco IOS XR Software are as follows:    Security Impact Rating (SIR): Low    CVSS Base Score: 3.7    CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.12%
Affected: Cisco Cisco IOS XR Software
Published at:
Updated at:

References

Link Tags
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-twamp-kV4FHugn

Frequently Asked Questions

What is the severity of CVE-2025-20154?
CVE-2025-20154 has been scored as a high severity vulnerability.
How to fix CVE-2025-20154?
To fix CVE-2025-20154, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-20154 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-20154 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-20154?
CVE-2025-20154 affects Cisco Cisco IOS XR Software.
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