---
id: CVE-2025-20171
title: Cisco IOS and IOS XE  SNMP Denial of Service Vulnerabilities
summary: >-
  Multiple vulnerabilities in the Simple Network Management Protocol (SNMP)
  subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR
  Software could allow an authenticated, remote attacker to cause a denial of
  service (DoS) co…
severity: high
cvss: 7.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H'
cvssSource: vendor
vendor: Cisco
product: IOS
affected:
  - ios_xe_software 3.2.0SG
  - ios_xe_software 3.2.1SG
  - ios_xe_software 3.7.0S
  - ios_xe_software 3.7.1S
  - ios_xe_software 3.3.0SG
  - ios_xe_software 3.7.2S
  - ios_xe_software 3.7.3S
  - ios_xe_software 3.7.4S
  - ios_xe_software 3.8.0S
  - ios_xe_software 3.8.1S
  - ios_xe_software 3.8.2S
  - ios_xe_software 3.9.1S
  - ios_xe_software 3.9.0S
  - ios_xe_software 3.2.0SE
  - ios_xe_software 3.3.0SE
  - ios_xe_software 3.2.1SE
  - ios_xe_software 3.2.2SE
  - ios_xe_software 3.2.3SE
  - ios_xe_software 3.2.2SG
  - ios_xe_software 3.2.3SG
  - ios_xe_software 3.2.4SG
  - ios_xe_software 3.2.5SG
  - ios_xe_software 3.3.2SG
  - ios_xe_software 3.4.0SG
  - ios_xe_software 3.4.2SG
  - ios_xe_software 3.3.1SG
  - ios_xe_software 3.4.1SG
  - ios_xe_software 3.3.1SE
  - ios_xe_software 3.5.0E
  - ios_xe_software 3.10.0S
  - ios_xe_software 3.10.1S
  - ios_xe_software 3.10.2S
  - ios_xe_software 3.11.1S
  - ios_xe_software 3.12.0S
  - ios_xe_software 3.11.2S
  - ios_xe_software 3.13.0S
  - ios_xe_software 3.10.3S
  - ios_xe_software 3.10.4S
  - ios_xe_software 3.7.5S
  - ios_xe_software 3.7.6S
published: '2025-02-05'
updated: '2025-03-12'
sourceUpdated: '2025-03-12T15:22:33+00:00'
source: CSAF
sourceUrl: >-
  https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-dos-sdxnSUcW
references:
  - url: >-
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-dos-sdxnSUcW
  - url: 'https://software.cisco.com'
tags:
  - csaf
  - vendor-advisory
  - cisco
epss: 0.00783
epssPercentile: 0.55832
ingestedAt: '2026-10-16T11:53:41.636Z'
---

## Overview

Multiple vulnerabilities in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.

For more information about these vulnerabilities, see the Details ["#details"] section of this advisory.

Cisco plans to release software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities. There are mitigations that address these vulnerabilities.

## Vendor advisories

- **cisco-sa-snmp-dos-sdxnSUcW** · Cisco · affected: Cisco IOS XE Software (503 versions), IOS (1141 versions) · updated 2025-03-12 · [advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-dos-sdxnSUcW)

**Cisco IOS, IOS XE, and IOS XR Software SNMP Denial of Service Vulnerabilities**. Released 2025-02-05, updated 2025-03-12.

Affected:

- Cisco IOS XE Software 3.2.0SG
- Cisco IOS XE Software 3.2.1SG
- Cisco IOS XE Software 3.7.0S
- Cisco IOS XE Software 3.7.1S
- Cisco IOS XE Software 3.3.0SG
- Cisco IOS XE Software 3.7.2S
- Cisco IOS XE Software 3.7.3S
- Cisco IOS XE Software 3.7.4S
- Cisco IOS XE Software 3.8.0S
- Cisco IOS XE Software 3.8.1S
- Cisco IOS XE Software 3.8.2S
- Cisco IOS XE Software 3.9.1S
- Cisco IOS XE Software 3.9.0S
- Cisco IOS XE Software 3.2.0SE
- Cisco IOS XE Software 3.3.0SE
- Cisco IOS XE Software 3.2.1SE
- Cisco IOS XE Software 3.2.2SE
- Cisco IOS XE Software 3.2.3SE
- Cisco IOS XE Software 3.2.2SG
- Cisco IOS XE Software 3.2.3SG
- Cisco IOS XE Software 3.2.4SG
- Cisco IOS XE Software 3.2.5SG
- Cisco IOS XE Software 3.3.2SG
- Cisco IOS XE Software 3.4.0SG
- Cisco IOS XE Software 3.4.2SG
- Cisco IOS XE Software 3.3.1SG
- Cisco IOS XE Software 3.4.1SG
- Cisco IOS XE Software 3.3.1SE
- Cisco IOS XE Software 3.5.0E
- Cisco IOS XE Software 3.10.0S
- Cisco IOS XE Software 3.10.1S
- Cisco IOS XE Software 3.10.2S
- Cisco IOS XE Software 3.11.1S
- Cisco IOS XE Software 3.12.0S
- Cisco IOS XE Software 3.11.2S
- Cisco IOS XE Software 3.13.0S
- Cisco IOS XE Software 3.10.3S
- Cisco IOS XE Software 3.10.4S
- Cisco IOS XE Software 3.7.5S
- Cisco IOS XE Software 3.7.6S

## Remediation

Cisco has released software updates that address this vulnerability. https://software.cisco.com