[NEW] [high] WatchGuard Firebox: Multiple vulnerabilities

CSIRTS triage

What

Multiple vulnerabilities can be exploited by a remote, anonymous attacker to execute arbitrary code, cause denial of service, manipulate or disclose data, and perform cross-site scripting attacks.

Who is affected

Deployments of WatchGuard Firebox are affected.

Urgency

Remediation is critical due to the high risk of remote exploitation.

Action

Update WatchGuard Firebox to the latest version.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source

CERT-Bund (BSI) Security Advisories (DE · national-cert · site)

Severity

high

Published

2026-07-03

Exploitation

Not in CISA KEV at last sync

Language

Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2193

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

• Low exploitation riskCVE-2026-130500.44% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 35% of all scored CVEs.
• Low exploitation riskCVE-2026-130530.40% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 32% of all scored CVEs.
• Low exploitation riskCVE-2026-130540.39% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 31% of all scored CVEs.
• Low exploitation riskCVE-2026-130790.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 1% of all scored CVEs.
• Low exploitation riskCVE-2026-130840.50% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 39% of all scored CVEs.
• Low exploitation riskCVE-2026-133680.65% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 47% of all scored CVEs.
• Low exploitation riskCVE-2026-133710.31% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 23% of all scored CVEs.
• Low exploitation riskCVE-2026-133730.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all scored CVEs.
• Low exploitation riskCVE-2026-133740.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all scored CVEs.
• Low exploitation riskCVE-2026-133750.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all scored CVEs.

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• unknownCVE-2026-8247: An Out-of-bounds Write vulnerability in WatchGuard Fireware OS may allow an unauthenticated att…nvd
• mediumCVE-2026-13728: In exception circumstances, WatchGuard Fireware OS on a FireCluster may use a hard-coded encry…nvd
• unknownCVE-2026-13722: WatchGuard Fireware OS contains a firmware validation bypass when processing a backup image vi…nvd
• highCVE-2026-13384: An Out-of-bounds Write vulnerability in WatchGuard Fireware OS wgagent process could allow an …nvd
• highCVE-2026-13383: An Out-of-bounds Write vulnerability in WatchGuard Fireware OS ikestubd process could allow an…nvd
• mediumCVE-2026-13377: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vu…nvd
• mediumCVE-2026-13376: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vu…nvd
• mediumCVE-2026-13375: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vu…nvd
• mediumCVE-2026-13374: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vu…nvd
• mediumCVE-2026-13373: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vu…nvd
• unknownCVE-2026-13371: An authenticated administrator can trigger a denial-of-service condition in the Fireware Manag…nvd
• unknownCVE-2026-13368: WatchGuard Fireware OS contains a race condition leading to a use-after-free vulnerability in …nvd

Recent advisories for WatchGuard Firebox

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

• unknownCVE-2026-13054: A path traversal vulnerability in the WatchGuard Fireware OS Management Web UI allows a privil…nvd · 2026-07-03
• criticalexploitedCVE-2025-14733: WatchGuard Firebox Out of Bounds Write Vulnerabilitycisa-kev · 2025-12-19
• criticalexploitedCVE-2025-9242: WatchGuard Firebox Out-of-Bounds Write Vulnerabilitycisa-kev · 2025-11-12
• criticalexploitedCVE-2022-23176: WatchGuard Firebox and XTM Privilege Escalation Vulnerabilitycisa-kev · 2022-04-11
• criticalexploitedCVE-2022-26318: WatchGuard Firebox and XTM Appliances Arbitrary Code Executioncisa-kev · 2022-03-25

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