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Medium severity5.4CISA KEVNVD Advisory· Published Feb 25, 2026· Updated Apr 21, 2026

CVE-2026-20122

CVE-2026-20122

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 exploit could allow the attacker to overwrite arbitrary files on the affected system and gain vmanage user privileges.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

3
  • Cisco Systems, Inc./Catalyst SD-WAN Manager3 versions
    cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:a:cisco:catalyst_sd-wan_manager:*:*:*:*:*:*:*:*range: <20.9.8.2
    • cpe:2.3:a:cisco:catalyst_sd-wan_manager:20.12.6:*:*:*:*:*:*:*
    • (no CPE)

Patches

Vulnerability mechanics

References

2

News mentions

15