CVE-2026-20122
Cisco Catalyst SD-WAN Manager Incorrect Use of Privileged APIs Vulnerability
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 exploit could allow the attacker to overwrite arbitrary files on the affected system and gain vmanage user privileges.
Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlines in CISA’s Emergency Directive 26-03 (URL listed below in Notes) and CISA’s “Hunt & Hardening Guidance for Cisco SD-WAN Devices (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available. Deadline for federal agencies: 2026-04-23.
2 articles across 2 outlets · first covered Apr 21, 2026 · latest Apr 21, 2026
Associated threat actors
Coverage timeline
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CISA adds eight KEV flaws, Cisco SDWAN bugs actively exploitedthehackernews.com · Apr 21, 2026
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CISA Adds CVE-2026-20122 to Known Exploited Vulnerabilities Cataloguecisa.gov · Apr 21, 2026