CVE-2025-20171

Name: CVE-2025-20171
Creator: NVD / NIST
Published: 2025-02-05T17:15:23.753+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.7/10EPSS 0.72%

Last modified Jun 17, 2026

CVE-2025-20171 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 0.72% 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

0.72%

49.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-248

Affected Software

Vendor	Product	Versions
Cisco	Ios	12.2\(33\)cx
Cisco	Ios	12.2\(33\)cy
Cisco	Ios	12.2\(33\)cy1
Cisco	Ios	12.2\(33\)cy2
Cisco	Ios	12.2\(33\)ira
Cisco	Ios	12.2\(33\)irb
Cisco	Ios	12.2\(33\)irc
Cisco	Ios	12.2\(33\)ird
Cisco	Ios	12.2\(33\)ire
Cisco	Ios	12.2\(33\)ire1
Cisco	Ios	12.2\(33\)ire2
Cisco	Ios	12.2\(33\)irf
Cisco	Ios	12.2\(33\)irg
Cisco	Ios	12.2\(33\)irg1
Cisco	Ios	12.2\(33\)irh
Cisco	Ios	12.2\(33\)irh1
Cisco	Ios	12.2\(33\)mra
Cisco	Ios	12.2\(33\)mrb
Cisco	Ios	12.2\(33\)mrb1
Cisco	Ios	12.2\(33\)mrb2
Cisco	Ios	12.2\(33\)mrb3
Cisco	Ios	12.2\(33\)mrb4
Cisco	Ios	12.2\(33\)mrb5
Cisco	Ios	12.2\(33\)mrb6
Cisco	Ios	12.2\(33\)sb
Cisco	Ios	12.2\(33\)sb1
Cisco	Ios	12.2\(33\)sb2
Cisco	Ios	12.2\(33\)sb3
Cisco	Ios	12.2\(33\)sb4
Cisco	Ios	12.2\(33\)sb5
Cisco	Ios	12.2\(33\)sb6
Cisco	Ios	12.2\(33\)sb7
Cisco	Ios	12.2\(33\)sb8
Cisco	Ios	12.2\(33\)sb8a
Cisco	Ios	12.2\(33\)sb9
Cisco	Ios	12.2\(33\)sb10
Cisco	Ios	12.2\(33\)sb11
Cisco	Ios	12.2\(33\)sb12
Cisco	Ios	12.2\(33\)sb13
Cisco	Ios	12.2\(33\)sb14
Cisco	Ios	12.2\(33\)sb15
Cisco	Ios	12.2\(33\)sb16
Cisco	Ios	12.2\(33\)sb17
Cisco	Ios	12.2\(33\)sca
Cisco	Ios	12.2\(33\)sca1
Cisco	Ios	12.2\(33\)sca2
Cisco	Ios	12.2\(33\)scb
Cisco	Ios	12.2\(33\)scb1
Cisco	Ios	12.2\(33\)scb2
Cisco	Ios	12.2\(33\)scb3

Showing 50 of 1579 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-2025-20171?

How severe is CVE-2025-20171?

CVE-2025-20171 has a CVSS score of 7.7/10 (HIGH severity). The EPSS model estimates a 0.72% probability of exploitation in the next 30 days.

How do I fix CVE-2025-20171?

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-2025-20171?

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

Scan your code now

Source: NVD / NIST