How severe is CVE-2026-3344?

CVE-2026-3344 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-3344 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3344?

CVE-2026-3344 affects Watchguard Fireware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3344?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-3344 have an EU (EUVD) identifier?

Yes. CVE-2026-3344 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9290.

When was CVE-2026-3344 published?

CVE-2026-3344 was published on 2026-03-03 and last updated on 2026-06-17.

CVE-2026-3344

CVE-2026-3344 is a medium-severity vulnerability in Watchguard Fireware with a CVSS 3.x base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-440.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
CVSS v4: 6.9
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9290
Weakness: CWE-440
Affected product: Watchguard Fireware
Published: 2026-03-03
Last modified: 2026-06-17

Description

A vulnerability in WatchGuard Fireware OS may allow an attacker to bypass the Fireware OS filesystem integrity check and maintain limited persistence via a maliciously-crafted firmware update package.This issue affects Fireware OS 12.0 up to and including 12.11.7, 12.5.9 up to and including 12.5.16, and 2025.1 up to and including 2026.1.1.

Frequently asked questions

What is CVE-2026-3344?: A vulnerability in WatchGuard Fireware OS may allow an attacker to bypass the Fireware OS filesystem integrity check and maintain limited persistence via a maliciously-crafted firmware update package.This issue affects Fireware OS 12.0 up to and including 12.11.7, 12.5.9 up to and including 12.5.16, and 2025.1 up to and including 2026.1.1.
How severe is CVE-2026-3344?: CVE-2026-3344 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-3344 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3344?: CVE-2026-3344 affects Watchguard Fireware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3344?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-3344 have an EU (EUVD) identifier?: Yes. CVE-2026-3344 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9290.
When was CVE-2026-3344 published?: CVE-2026-3344 was published on 2026-03-03 and last updated on 2026-06-17.

References

https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00005

Affected products (1)

cpe:2.3:o:watchguard:fireware:*:*:*:*:*:*:*:*

More vulnerabilities in Watchguard Fireware

CVE-2025-14733 — Critical (CVSS 9.8): An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow a remote unauthenticated attacker to execute…
CVE-2025-9242 — Critical (CVSS 9.8): An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow a remote unauthenticated attacker to execute…
CVE-2022-31789 — Critical (CVSS 9.8): An integer overflow in WatchGuard Firebox and XTM appliances allows an unauthenticated remote attacker to trigger a…
CVE-2022-26318 — Critical (CVSS 9.8): On WatchGuard Firebox and XTM appliances, an unauthenticated user can execute arbitrary code, aka FBX-22786. This…
CVE-2013-6021 — Critical (CVSS 9.3): Buffer overflow in WGagent in WatchGuard WSM and Fireware before 11.8 allows remote attackers to execute arbitrary code…
CVE-2022-25361 — Critical (CVSS 9.1): WatchGuard Firebox and XTM appliances allow an unauthenticated remote attacker to delete arbitrary files from a limited…

All CVEs affecting Watchguard Fireware →

Other CWE-440 vulnerabilities

CVE-2019-6569 — Critical (CVSS 9.1): The monitor barrier of the affected products insufficiently blocks data from being forwarded over the mirror port into…
CVE-2024-32971 — Critical (CVSS 9.0): Apollo Router is a configurable, graph router written in Rust to run a federated supergraph that uses Apollo Federation…
CVE-2025-8850 — High (CVSS 8.8): In danny-avila/librechat version 0.7.9, there is an insecure API design issue in the 2-Factor Authentication (2FA)…
CVE-2026-8806 — High (CVSS 8.7): Expected Behavior Violation vulnerability in Mitsubishi Electric MELSEC iQ-F Series FX5-ENET/IP Ethernet Module…
CVE-2018-12550 — High (CVSS 8.1): When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use an ACL file, and that ACL file is empty,…
CVE-2023-4807 — High (CVSS 7.8): Issue summary: The POLY1305 MAC (message authentication code) implementation contains a bug that might corrupt the…

Browse all CWE-440 vulnerabilities →