CVE-2025-20154: Cisco IOS, IOS XE and IOS XR Software TWAMP Denial of Service Vulnerability
First published: Wed May 07 2025(Updated: )
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
Credit: psirt@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS | ||
| Cisco IOS XE | ||
| Cisco IOS XRv 9000 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2025-20154?
CVE-2025-20154 has a high severity rating as it can lead to a denial of service (DoS) condition.
How do I fix CVE-2025-20154?
To mitigate CVE-2025-20154, users should apply the recommended patches or updates provided by Cisco for their affected devices.
What devices are impacted by CVE-2025-20154?
CVE-2025-20154 affects Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software.
Can CVE-2025-20154 be exploited remotely?
Yes, CVE-2025-20154 can be exploited by an unauthenticated, remote attacker.
What is the potential impact of CVE-2025-20154?
The potential impact of CVE-2025-20154 is device reload leading to a denial of service, affecting network availability.
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