CVE-2026-13377
A remote, anonymous attacker can exploit multiple vulnerabilities in WatchGuard Firebox to execute arbitrary code, cause a denial of service, manipulate or disclose data, and perform cross-site scripting attacks.
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.
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Exploitation outlook
- Low exploitation risk0.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all EPSS-scored CVEs.
Advisory coverage (2)
- high[NEW] [high] WatchGuard Firebox: Multiple vulnerabilitiescert-bund · 2026-07-03
- mediumCVE-2026-13377: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vu…nvd · 2026-07-03
External references
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