CVE-2025-20172

Name: CVE-2025-20172
Creator: NVD / NIST
Published: 2025-02-05T17:15:24.02+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.7/10EPSS 0.71%

Last modified Jun 17, 2026

CVE-2025-20172 is a high-severity vulnerability rated 7.7/10 on the CVSS scale. A vulnerability in the SNMP subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an authenticated, remote attacker to cause a DoS condition on an affected device. This vulnerability is due to improper error handling when parsing SNMP requests. An attacker could exploit this vulnerability by sending a crafted SNMP request to an affected device. EPSS estimates a 0.71% chance of exploitation in the next 30 days.

Description

A vulnerability in the SNMP subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an authenticated, remote attacker to cause a DoS condition on an affected device. This vulnerability is due to improper error handling when parsing SNMP requests. An attacker could exploit this vulnerability by sending a crafted SNMP request to an affected device. For Cisco IOS and IOS XE Software, a successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition. For Cisco IOS XR Software, a successful exploit could allow the attacker to cause the SNMP process to restart, resulting in an interrupted SNMP response from an affected device. Devices that are running Cisco IOS XR Software will not reload.  This vulnerability affects SNMP versions 1, 2c, and 3. To exploit this vulnerability through SNMP v2c or earlier, the attacker must know a valid read-write or read-only SNMP community string for the affected system. To exploit this vulnerability through SNMP v3, the attacker must have valid SNMP user credentials for the affected system.

Metrics

CVSS 3.1

7.7/10

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

EPSS Probability

0.71%

48.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-248

Affected Software

Vendor	Product	Versions
Cisco	Ios	12.2\(33\)sre
Cisco	Ios	12.2\(33\)sre0a
Cisco	Ios	12.2\(33\)sre1
Cisco	Ios	12.2\(33\)sre2
Cisco	Ios	12.2\(33\)sre3
Cisco	Ios	12.2\(33\)sre4
Cisco	Ios	12.2\(33\)sre5
Cisco	Ios	12.2\(33\)sre6
Cisco	Ios	12.2\(33\)sre7
Cisco	Ios	12.2\(33\)sre7a
Cisco	Ios	12.2\(33\)sre8
Cisco	Ios	12.2\(33\)sre9
Cisco	Ios	12.2\(33\)sre9a
Cisco	Ios	12.2\(33\)sre10
Cisco	Ios	12.2\(33\)sre11
Cisco	Ios	12.2\(33\)sre12
Cisco	Ios	12.2\(33\)sre13
Cisco	Ios	12.2\(33\)sre14
Cisco	Ios	12.2\(33\)sre15
Cisco	Ios	12.2\(33\)sre15a
Cisco	Ios	15.0\(1\)ex
Cisco	Ios	15.0\(1\)mr
Cisco	Ios	15.0\(1\)s
Cisco	Ios	15.0\(1\)s1
Cisco	Ios	15.0\(1\)s2
Cisco	Ios	15.0\(1\)s3a
Cisco	Ios	15.0\(1\)s4
Cisco	Ios	15.0\(1\)s4a
Cisco	Ios	15.0\(1\)s5
Cisco	Ios	15.0\(1\)s6
Cisco	Ios	15.0\(2\)ea
Cisco	Ios	15.0\(2\)ea1
Cisco	Ios	15.0\(2\)ej
Cisco	Ios	15.0\(2\)ej1
Cisco	Ios	15.0\(2\)ek
Cisco	Ios	15.0\(2\)ek1
Cisco	Ios	15.0\(2\)ex
Cisco	Ios	15.0\(2\)ex1
Cisco	Ios	15.0\(2\)ex2
Cisco	Ios	15.0\(2\)ex3
Cisco	Ios	15.0\(2\)ex4
Cisco	Ios	15.0\(2\)ex5
Cisco	Ios	15.0\(2\)ex8
Cisco	Ios	15.0\(2\)ex10
Cisco	Ios	15.0\(2\)ex11
Cisco	Ios	15.0\(2\)ex12
Cisco	Ios	15.0\(2\)ex13
Cisco	Ios	15.0\(2\)ey
Cisco	Ios	15.0\(2\)ey1
Cisco	Ios	15.0\(2\)ey2

Showing 50 of 1152 affected configurations. See NVD for the full list.

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-dos-sdxnSUcWVendor Advisory

Timeline

Published: Feb 5, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-20172?

How severe is CVE-2025-20172?

CVE-2025-20172 has a CVSS score of 7.7/10 (HIGH severity). The EPSS model estimates a 0.71% probability of exploitation in the next 30 days.

How do I fix CVE-2025-20172?

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-2025-20172?

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

Scan your code now

Source: NVD / NIST