Is CVE-2026-20210 actively exploited?

No active exploitation of CVE-2026-20210 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-20210 be exploited remotely?

Yes. CVE-2026-20210 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-20210?

CVE-2026-20210 has a CVSS score of 5.4 (MEDIUM).

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MEDIUM

CVE-2026-20210

CWE-779Published: May 14, 2026· Updated: May 14, 2026

5.4

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:7.6th

Official Description

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 modify configurations and perform unauthorized actions on an affected system.

This vulnerability exists because of a failure to redact sensitive information within device configurations and templates. An attacker could exploit this vulnerability by elevating their read-only permissions to those of a high-privileged user. A successful exploit could allow the attacker to access or modify configuration settings within Cisco Catalyst SD-WAN Manager as a high-privileged user.

NVD Source

Technical Analysis

CVE-2026-20210 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.