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High severity7.5CISA KEVNVD Advisory· Published Feb 25, 2026· Updated Apr 21, 2026

CVE-2026-20128

CVE-2026-20128

Description

A vulnerability in the Data Collection Agent (DCA) feature of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to gain DCA user privileges on an affected system.

This vulnerability is due to the presence of a credential file for the DCA user on an affected system. An attacker could exploit this vulnerability by sending a crafted HTTP request and reading the file that contains the DCA password from that affected system. A successful exploit could allow the attacker to access another affected system and gain DCA user privileges. Note: Cisco Catalyst SD-WAN Manager releases 20.18 and later are not affected by this vulnerability.

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)range: <20.18

Patches

Vulnerability mechanics

References

2

News mentions

15