Is CVE-2026-13046 being actively exploited?

CVE-2026-13046 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2026-13046?

CVE-2026-13046 has a CVSS 3.1 base score of 7.2 (HIGH).

CVE-2026-13046

HIGH · CVSS 7.2EPSS 0.4%EU EUVD

A deserialization of untrusted data vulnerability in WatchGuard Fireware OS's SAML single sign-on session handling (samld) allows an attacker who has already obtained the ability to write files on the appliance to execute arbitrary code in the context of the samld service by causing samld to load a maliciously crafted session file.

Key facts

CVSS score: 7.2 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-502
EPSS score: 0.4% (29th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2026-89498)
Published: September 30, 2026
NVD last modified: October 8, 2026
Status: Analyzed

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2026-89498 in the EU Vulnerability Database. Last updated in EUVD on October 1, 2026.

View on the EU Vulnerability Database

Affected products

watchguard / fireware

Certified products that may be affected

1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.

WatchGuard Fireware OS v12.3.1.B585922 (Running on Firebox Security Appliances) with WatchGuard Dimension 2.1.2.B588050 Software - WatchGuard Technologies Inc. - Common Criteria 2018-26-INF-3091 - archived

References

https://psirt.watchguard.com/CVE-2026-13046(Patch, Vendor Advisory)

Last updated October 10, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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