MEDIUM CISA KEV Actively Exploited

CVE-2026-20122

Cisco Catalyst SD-WAN Manager Arbitrary File Overwrite Vulnerability

CVSS v3

5.4

MEDIUM

EPSS Score

25.0 %

exploit probability, as of 2026-10-03

CISA KEV

Yes

known exploited

Exploitation

active

SSVC status

Description

A vulnerability in the API of Cisco Catalyst SD-WAN Manager could allow an authenticated, remote attacker to overwrite arbitrary files on the local file system. To exploit this vulnerability, the attacker must have valid read-only credentials with API access on the affected system. This vulnerability is due to improper file handling on the API interface of an affected system. An attacker could exploit this vulnerability by uploading a malicious file on the local file system. A successful expl

CISA Known Exploited Vulnerability

Date Added: 2026-04-20
Patch Due Date: 2026-04-23
Ransomware Use: Unknown

Technical details

Published: 2026-02-25
Last Modified: 2026-04-21

Frequently asked questions

What is CVE-2026-20122?

Is CVE-2026-20122 actively exploited?

Yes. CVE-2026-20122 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-04-23.

What is the CVSS score for CVE-2026-20122?

CVE-2026-20122 has a CVSS v3 base score of 5.4 (MEDIUM severity).

Is CVE-2026-20122 affecting your environment?

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