CVE-2026-20209 — The Web UI Of Cisco Catalyst SD-WAN Manager, Formerly SD-WAN Vulnerability
CVE-2026-20209 — A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authenticated, remote attacker with read-only permissions to elevate their privileges from low to high and perform actions as a high-privileged user. This vulnerability exists
What This Means For You
- If your environment is affected by CWE-779, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-20209 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
Privilege Escalation via Sensitive Session Info in Cisco SD-WAN Manager Web UI — CVE-2026-20209
title: Privilege Escalation via Sensitive Session Info in Cisco SD-WAN Manager Web UI — CVE-2026-20209
id: scw-2026-05-14-ai-1
status: experimental
level: high
description: |
Detects attempts to access audit logs in Cisco Catalyst SD-WAN Manager's web UI. This is a key step in exploiting CVE-2026-20209, where attackers with read-only privileges access sensitive session information within these logs to elevate their privileges.
author: SCW Feed Engine (AI-generated)
date: 2026-05-14
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-20209/
tags:
- attack.privilege_escalation
- attack.t1548.003
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/api/v1/audit/logs'
sc-status:
- 200
cs-method:
- 'GET'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-20209 | vulnerability | CVE-2026-20209 |
| CWE-779 | weakness | CWE-779 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 14, 2026 at 20:16 UTC |
This content was curated and summarized by Shimi's Cyber World for informational purposes. It is not copied or republished in full. All intellectual property rights remain with the original author and source.
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