---
id: CVE-2025-20221
title: Cisco IOS XE cEdge Information Disclosure Vulnerability
summary: "A vulnerability in the packet filtering features of Cisco IOS XE SD-WAN Software could allow an unauthenticated, remote attacker to bypass Layer 3 and Layer 4 traffic filters.\r\n\r\nThis vulnerability is due to improper traffic filtering cond…"
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cvssSource: vendor
vendor: Cisco
product: Cisco IOS XE Software
affected:
  - ios_xe_software 17.1.1
  - ios_xe_software 17.2.1
  - ios_xe_software 17.3.1
  - ios_xe_software 17.4.1
  - ios_xe_software 17.5.1
  - ios_xe_software 17.6.1
  - ios_xe_software 17.1.1s
  - ios_xe_software 17.3.2
  - ios_xe_software 17.2.1r
  - ios_xe_software 17.1.2
  - ios_xe_software 17.2.1a
  - ios_xe_software 17.1.1t
  - ios_xe_software 17.7.1
  - ios_xe_software 17.2.1v
  - ios_xe_software 17.10.1
  - ios_xe_software 17.3.3
  - ios_xe_software 17.4.2
  - ios_xe_software 17.8.1
  - ios_xe_software 17.9.1
  - ios_xe_software 17.2.2
  - ios_xe_software 17.3.1a
  - ios_xe_software 17.3.2a
  - ios_xe_software 17.1.3
  - ios_xe_software 17.4.1a
  - ios_xe_software 17.4.1b
  - ios_xe_software 17.2.3
  - ios_xe_software 17.3.4
  - ios_xe_software 17.5.1a
  - ios_xe_software 17.3.5
  - ios_xe_software 17.6.2
  - ios_xe_software 17.3.4a
  - ios_xe_software 17.6.1a
  - ios_xe_software 17.3.6
  - ios_xe_software 17.7.1a
  - ios_xe_software 17.6.3
  - ios_xe_software 17.8.1a
  - ios_xe_software 17.7.2
  - ios_xe_software 17.6.3a
  - ios_xe_software 17.11.1
  - ios_xe_software 17.12.1
published: '2025-05-07'
updated: '2025-09-22'
sourceUpdated: '2025-09-22T14:12:28+00:00'
source: CSAF
sourceUrl: >-
  https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-bypass-HHUVujdn
references:
  - url: >-
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-bypass-HHUVujdn
  - url: 'https://software.cisco.com'
tags:
  - csaf
  - vendor-advisory
  - cisco
epss: 0.00641
epssPercentile: 0.50516
ingestedAt: '2026-10-15T11:50:11.860Z'
---

## Overview

A vulnerability in the packet filtering features of Cisco IOS XE SD-WAN Software could allow an unauthenticated, remote attacker to bypass Layer 3 and Layer 4 traffic filters.

This vulnerability is due to improper traffic filtering conditions on an affected device. An attacker could exploit this vulnerability by sending a crafted packet to the affected device. A successful exploit could allow the attacker to bypass the Layer 3 and Layer 4 traffic filters and inject a crafted packet into the network.

Cisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability.



This advisory is part of the May 2025 release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: May 2025 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75279"].

## Vendor advisories

- **cisco-sa-snmp-bypass-HHUVujdn** · Cisco · affected: Cisco IOS XE Software (86 versions) · updated 2025-09-22 · [advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-bypass-HHUVujdn)

**Cisco IOS XE SD-WAN Software Packet Filtering Bypass Vulnerability**. Released 2025-05-07, updated 2025-09-22.

Affected:

- Cisco IOS XE Software 17.1.1
- Cisco IOS XE Software 17.2.1
- Cisco IOS XE Software 17.3.1
- Cisco IOS XE Software 17.4.1
- Cisco IOS XE Software 17.5.1
- Cisco IOS XE Software 17.6.1
- Cisco IOS XE Software 17.1.1s
- Cisco IOS XE Software 17.3.2
- Cisco IOS XE Software 17.2.1r
- Cisco IOS XE Software 17.1.2
- Cisco IOS XE Software 17.2.1a
- Cisco IOS XE Software 17.1.1t
- Cisco IOS XE Software 17.7.1
- Cisco IOS XE Software 17.2.1v
- Cisco IOS XE Software 17.10.1
- Cisco IOS XE Software 17.3.3
- Cisco IOS XE Software 17.4.2
- Cisco IOS XE Software 17.8.1
- Cisco IOS XE Software 17.9.1
- Cisco IOS XE Software 17.2.2
- Cisco IOS XE Software 17.3.1a
- Cisco IOS XE Software 17.3.2a
- Cisco IOS XE Software 17.1.3
- Cisco IOS XE Software 17.4.1a
- Cisco IOS XE Software 17.4.1b
- Cisco IOS XE Software 17.2.3
- Cisco IOS XE Software 17.3.4
- Cisco IOS XE Software 17.5.1a
- Cisco IOS XE Software 17.3.5
- Cisco IOS XE Software 17.6.2
- Cisco IOS XE Software 17.3.4a
- Cisco IOS XE Software 17.6.1a
- Cisco IOS XE Software 17.3.6
- Cisco IOS XE Software 17.7.1a
- Cisco IOS XE Software 17.6.3
- Cisco IOS XE Software 17.8.1a
- Cisco IOS XE Software 17.7.2
- Cisco IOS XE Software 17.6.3a
- Cisco IOS XE Software 17.11.1
- Cisco IOS XE Software 17.12.1

## Remediation

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