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CVE-2025-20154

HIGHCVSS 8.6/10EPSS 0.44%

Last modified

CVE-2025-20154 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. 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. EPSS estimates a 0.44% chance of exploitation in the next 30 days.

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

Metrics

CVSS 3.1
8.6/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS Probability
0.44%

35.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoIos<= 15.9\(3\)m11
CiscoIos Xe>= 16.6.1, <= 17.2.3
CiscoIos Xr6.5.1
CiscoIos Xr6.5.2
CiscoIos Xr6.5.3
CiscoIos Xr6.5.15
CiscoIos Xr6.5.25
CiscoIos Xr6.5.26
CiscoIos Xr6.5.28
CiscoIos Xr6.5.29
CiscoIos Xr6.5.31
CiscoIos Xr6.5.32
CiscoIos Xr6.5.33
CiscoIos Xr6.5.35
CiscoIos Xr6.5.90
CiscoIos Xr6.5.92
CiscoIos Xr6.5.93
CiscoIos Xr6.6.1
CiscoIos Xr6.6.2
CiscoIos Xr6.6.3
CiscoIos Xr6.6.4
CiscoIos Xr6.6.11
CiscoIos Xr6.6.12
CiscoIos Xr6.6.25
CiscoIos Xr6.7.1
CiscoIos Xr6.7.2
CiscoIos Xr6.7.3
CiscoIos Xr6.7.4
CiscoIos Xr6.7.35
CiscoIos Xr6.8.1
CiscoIos Xr6.8.2
CiscoIos Xr6.9.1
CiscoIos Xr6.9.2
CiscoIos Xr7.0.0
CiscoIos Xr7.0.1
CiscoIos Xr7.0.2
CiscoIos Xr7.0.11
CiscoIos Xr7.0.12
CiscoIos Xr7.0.14
CiscoIos Xr7.0.90
CiscoIos Xr7.1.1
CiscoIos Xr7.1.2
CiscoIos Xr7.1.3
CiscoIos Xr7.1.15
CiscoIos Xr7.1.25
CiscoIos Xr7.2.0
CiscoIos Xr7.2.1
CiscoIos Xr7.2.2
CiscoIos Xr7.2.12
CiscoIos Xr7.3.1

Showing 50 of 94 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2025-20154?
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&nbsp;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:&nbsp;&nbsp;&nbsp;&nbsp;Security Impact Rating (SIR): Low&nbsp;&nbsp;&nbsp;&nbsp;CVSS Base Score: 3.7&nbsp;&nbsp;&nbsp;&nbsp;CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
How severe is CVE-2025-20154?
CVE-2025-20154 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 0.44% probability of exploitation in the next 30 days.
How do I fix CVE-2025-20154?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-20154?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST