CVE-2025-20173

Name: CVE-2025-20173
Creator: NVD / NIST
Published: 2025-02-05T17:15:24.263+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.7/10EPSS 0.71%

Last modified Jun 17, 2026

CVE-2025-20173 is a high-severity vulnerability rated 7.7/10 on the CVSS scale. A vulnerability in the SNMP subsystem of Cisco IOS Software and Cisco IOS XE 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 and Cisco IOS XE 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. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition.  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	12.2\(46\)sg
Cisco	Ios	12.2\(46\)sg1
Cisco	Ios	12.2\(50\)se
Cisco	Ios	12.2\(50\)se1
Cisco	Ios	12.2\(50\)se2
Cisco	Ios	12.2\(50\)se3
Cisco	Ios	12.2\(50\)se4
Cisco	Ios	12.2\(50\)se5
Cisco	Ios	12.2\(50\)sg
Cisco	Ios	12.2\(50\)sg1
Cisco	Ios	12.2\(50\)sg2
Cisco	Ios	12.2\(50\)sg3
Cisco	Ios	12.2\(50\)sg4
Cisco	Ios	12.2\(50\)sg5
Cisco	Ios	12.2\(50\)sg6
Cisco	Ios	12.2\(50\)sg7
Cisco	Ios	12.2\(50\)sg8
Cisco	Ios	12.2\(50\)sq
Cisco	Ios	12.2\(50\)sq1
Cisco	Ios	12.2\(50\)sq2
Cisco	Ios	12.2\(50\)sq3
Cisco	Ios	12.2\(50\)sq4
Cisco	Ios	12.2\(50\)sq5
Cisco	Ios	12.2\(50\)sq6
Cisco	Ios	12.2\(50\)sq7
Cisco	Ios	12.2\(52\)ex
Cisco	Ios	12.2\(52\)ex1
Cisco	Ios	12.2\(52\)ey
Cisco	Ios	12.2\(52\)ey1
Cisco	Ios	12.2\(52\)ey1b

Showing 50 of 1411 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-2025-20173?

How severe is CVE-2025-20173?

CVE-2025-20173 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-2025-20173?

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-2025-20173?

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

Scan your code now

Source: NVD / NIST