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CVE-2026-20128

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

7.5 HIGHActively exploited (CISA KEV)EPSS 7.06%
  1. Published25 Feb 2026
  2. Added to CISA KEV20 Apr 2026
  3. Remediation due23 Apr 2026
Actively exploited (CISA KEV)

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.

Added to KEV: 20 Apr 2026Federal remediation due: 23 Apr 2026

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.

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityHigh
Privileges requiredHigh
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected products

Cisco Catalyst SD-WAN Manager≥ 20.10 < 20.12.5.3 · ≥ 20.13 < 20.15.4.2 · ≥ 20.16 < 20.18 · < 20.9.8.2

Remediation

Fixed in
Cisco Catalyst SD-WAN Manager≥ 20.12.5.3

References

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Frequently asked

Is CVE-2026-20128 being actively exploited?

Yes. CVE-2026-20128 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 20 Apr 2026.

How severe is CVE-2026-20128?

CVE-2026-20128 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 7.06% probability of exploitation.

Which products are affected by CVE-2026-20128?

Affected products include Cisco Catalyst SD-WAN Manager.

How do I fix CVE-2026-20128?

Upgrade affected software to a fixed version, for example Cisco Catalyst SD-WAN Manager 20.12.5.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-20128 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.