CVE-2025-20174

Name: CVE-2025-20174
Creator: NVD / NIST
Published: 2025-02-05T17:15:24.513+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.7/10EPSS 0.71%

Last modified Jun 17, 2026

CVE-2025-20174 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-805

Affected Software

Vendor	Product	Versions
Cisco	Ios	15.2\(1\)sy
Cisco	Ios	15.2\(1\)sy0a
Cisco	Ios	15.2\(1\)sy1
Cisco	Ios	15.2\(1\)sy1a
Cisco	Ios	15.2\(1\)sy2
Cisco	Ios	15.2\(1\)sy3
Cisco	Ios	15.2\(1\)sy4
Cisco	Ios	15.2\(1\)sy5
Cisco	Ios	15.2\(1\)sy6
Cisco	Ios	15.2\(1\)sy7
Cisco	Ios	15.2\(1\)sy8
Cisco	Ios	15.2\(2\)sy
Cisco	Ios	15.2\(2\)sy1
Cisco	Ios	15.2\(2\)sy2
Cisco	Ios	15.2\(2\)sy3
Cisco	Ios	15.3\(1\)sy
Cisco	Ios	15.3\(1\)sy1
Cisco	Ios	15.3\(1\)sy2
Cisco	Ios	15.4\(1\)cg
Cisco	Ios	15.4\(1\)cg1
Cisco	Ios	15.4\(1\)s
Cisco	Ios	15.4\(1\)s1
Cisco	Ios	15.4\(1\)s2
Cisco	Ios	15.4\(1\)s3
Cisco	Ios	15.4\(1\)s4
Cisco	Ios	15.4\(1\)sy
Cisco	Ios	15.4\(1\)sy1
Cisco	Ios	15.4\(1\)sy2
Cisco	Ios	15.4\(1\)sy3
Cisco	Ios	15.4\(1\)sy4
Cisco	Ios	15.4\(1\)t
Cisco	Ios	15.4\(1\)t1
Cisco	Ios	15.4\(1\)t2
Cisco	Ios	15.4\(1\)t3
Cisco	Ios	15.4\(1\)t4
Cisco	Ios	15.4\(2\)cg
Cisco	Ios	15.4\(2\)s
Cisco	Ios	15.4\(2\)s1
Cisco	Ios	15.4\(2\)s2
Cisco	Ios	15.4\(2\)s3
Cisco	Ios	15.4\(2\)s4
Cisco	Ios	15.4\(2\)t
Cisco	Ios	15.4\(2\)t1
Cisco	Ios	15.4\(2\)t2
Cisco	Ios	15.4\(2\)t3
Cisco	Ios	15.4\(2\)t4
Cisco	Ios	15.4\(3\)s
Cisco	Ios	15.4\(3\)s1
Cisco	Ios	15.4\(3\)s2
Cisco	Ios	15.4\(3\)s3

Showing 50 of 478 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-2025-20174?

How severe is CVE-2025-20174?

CVE-2025-20174 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-2025-20174?

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-2025-20174?

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

Scan your code now

Source: NVD / NIST