CVE-2026-20128CiscoRouters and networkingApril 20, 2026

Cisco Catalyst SD-WAN Manager Storing Passwords in a Recoverable Format Vulnerability

High 7.5Actively exploited

Description

Cisco Catalyst SD-WAN Manager contains a storing passwords in a recoverable format vulnerability that allows an authenticated, local attacker to gain DCA user privileges by accessing a credential file for the DCA user on the filesystem as a low-privileged user.

What to do

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.

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Details

Vendor
Cisco
Product
Cisco Catalyst SD-WAN Manager
CVE
CVE-2026-20128
Affected versions
Cisco Catalyst SD-WAN Manager 20.1: 6 versions, from 20.1.1 to 20.1.12
Cisco Catalyst SD-WAN Manager 19.2: 14 versions, from 19.2.0 to 19.2.929
Cisco Catalyst SD-WAN Manager 18.4: 10 versions, from 18.4.0 to 18.4.501_ES
Cisco Catalyst SD-WAN Manager 19.3: 19.3.0
Cisco Catalyst SD-WAN Manager 18.3: 11 versions, from 18.3.0 to 18.3.8
Cisco Catalyst SD-WAN Manager 19.0: 19.0.0; 19.0.1a
Cisco Catalyst SD-WAN Manager 19.1: 19.1.0
Cisco Catalyst SD-WAN Manager 17.2: 6 versions, from 17.2.5 to 17.2.10
Cisco Catalyst SD-WAN Manager 18.2: 18.2.0
Cisco Catalyst SD-WAN Manager 20.3: 48 versions, from 20.3.1 to 20.3.814
Cisco Catalyst SD-WAN Manager 20.4: 14 versions, from 20.4.1.0.1 to 20.4.2.3
Cisco Catalyst SD-WAN Manager 20.5: 5 versions, from 20.5.0.1.1 to 20.5.1.2
Cisco Catalyst SD-WAN Manager 20.6: 13 versions, from 20.6.0.18.3 to 20.6.5.1.4
Cisco Catalyst SD-WAN Manager 20.7: 20.7.1EFT2
Cisco Catalyst SD-WAN Manager 20.9: 20.9.1EFT2
Cisco Catalyst SD-WAN Manager 20.12: 20.12.501
Cisco Catalyst SD-WAN Manager 26.1: 26.1.1 (from the advisory and NVD; check the exact builds in the official advisory)
CVSS score
7.5
Actively exploited
Yes, listed in the CISA Known Exploited Vulnerabilities catalog
CISA due date
April 23, 2026 (deadline for US federal agencies: a good benchmark for you too)
Source
CISA KEV – original advisory
Published
April 20, 2026

The description and the recommended action are quoted from the public advisory; severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.

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