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.
How to fix
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.
CISA due date: Apr 23, 2026- cisco catalyst_sd-wan_manager20.9.8.2, 20.12.5.3, 20.15.4.2, 20.18 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco catalyst_sd-wan_manager | v < 20.9.8.2, 20.10 ≤ v < 20.12.5.3, 20.13 ≤ v < 20.15.4.2, 20.16 ≤ v < 20.18, 20.12.6 | 20.9.8.2, 20.12.5.3, 20.15.4.2, 20.18 |
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