---
id: "CVE-2026-20262"
kind: "vulnerability"
aliases: ["CVE-2026-20262"]
title: "A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an\u2026"
severity: "critical"
cvss: 6.5
epss: null
exploited: true
status: "open"
category: "vendor"
products: [{"name": "cisco catalyst sd-wan manager", "fixed": ["20.9.9.2"], "affected": "< 20.9.9.2", "ecosystem": "vendor"}, {"name": "cisco catalyst sd-wan manager", "fixed": ["20.12.7.2"], "affected": ">= 20.10, < 20.12.7.2", "ecosystem": "vendor"}, {"name": "cisco catalyst sd-wan manager", "fixed": ["20.15.4.5"], "affected": ">= 20.13, < 20.15.4.5", "ecosystem": "vendor"}, {"name": "cisco catalyst sd-wan manager", "fixed": ["20.15.5.3"], "affected": ">= 20.15.5, < 20.15.5.3", "ecosystem": "vendor"}, {"name": "cisco catalyst sd-wan manager", "fixed": ["20.18.3.1"], "affected": ">= 20.16, < 20.18.3.1", "ecosystem": "vendor"}, {"name": "cisco catalyst sd-wan manager", "fixed": ["26.1.1.2"], "affected": ">= 26.1, < 26.1.1.2", "ecosystem": "vendor"}, {"name": "Cisco Catalyst SD-WAN Manager", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["catalyst-sd-wan-manager", "cisco", "exploited", "sd-wan", "self-hosted", "vendor"]
not_affected_if: ["managed-hosting", "no-sd-wan-manager-deployed"]
published_at: "2026-06-15T00:00:00+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-24T00:09:50+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-20262", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20262", "first_seen_at": "2026-10-23T23:44:51+00:00"}]
---

# A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an…

Cisco Catalyst SD-WAN Manager has a path traversal flaw that lets an authenticated remote attacker create or overwrite any file on the system. CISA lists it as actively exploited in the wild.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:cisco catalyst sd-wan manager affected < 20.9.9.2 fixed 20.9.9.2
- vendor:cisco catalyst sd-wan manager affected >= 20.10, < 20.12.7.2 fixed 20.12.7.2
- vendor:cisco catalyst sd-wan manager affected >= 20.13, < 20.15.4.5 fixed 20.15.4.5
- vendor:cisco catalyst sd-wan manager affected >= 20.15.5, < 20.15.5.3 fixed 20.15.5.3
- vendor:cisco catalyst sd-wan manager affected >= 20.16, < 20.18.3.1 fixed 20.18.3.1
- vendor:cisco catalyst sd-wan manager affected >= 26.1, < 26.1.1.2 fixed 26.1.1.2
- vendor:Cisco Catalyst SD-WAN Manager affected ? fixed ?

## Fix

Apply the mitigations and patches in Cisco's advisory for CVE-2026-20262, following CISA BOD 26-04 guidance. If mitigations are unavailable, discontinue use of the product per CISA's required action.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-20262
- 2026-10-23T23:44:51+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-20262

## From the sources

A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authenticated, remote attacker to create a file or overwrite any file on the filesystem of an affected system.

This vulnerability exists because the affected software does not properly validate user-supplied input during a file upload process. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected API endpoint of the affected system. A successful exploit could allow the attacker to create or overwrite any file on the underlying operating system. This file could later be used to elevate to root. To exploit this vulnerability, the attacker must have valid credentials with at least a lower-privileged, single-task user account.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_