CVE-2026-90442: Stack Overflow

Description

A stack-based buffer overflow vulnerability in the Fireware OS certd process allows an authenticated attacker with access to the Firebox management interface to crash the certificate management service and potentially execute arbitrary code by sending a specially crafted request.

Is your site exposed to CVE-2026-90442?

Run a free security scan — no signup, results in seconds.

Weakness Type (CWE)

CWE-121 CWE-121

CWE-787 Out-of-bounds Write

References

Other References

https://psirt.watchguard.com/CVE-2026-90442

Frequently Asked Questions

What is CVE-2026-90442? +

A stack-based buffer overflow vulnerability in the Fireware OS certd process allows an authenticated attacker with access to the Firebox management interface to crash the certificate management service and potentially execute arbitrary code by sending a specially crafted request.

How do I check if I'm vulnerable to CVE-2026-90442? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-6239

A stack‑based buffer overflow vulnerability exists in Tapo C520WS v2 in the ONVIF CreateUsers service, where the device fails to …

CVE-2026-57161

PJSIP is a free and open source multimedia communication library written in C. Prior to commit acc03b5, a stack buffer …

CVE-2026-8356

LibreOffice can import presentations in the legacy binary PPT format. A stack buffer overflow existed when importing a colour-replacement record. …

CVE-2026-40489

editorconfig-core-c is an EditorConfig core library for use by plugins supporting EditorConfig parsing. Versions up to and including 0.12.10 have …

CVE-2025-26382

Under certain circumstances the iSTAR Configuration Utility (ICU) tool could have a buffer overflow issue

CVE-2025-1533

A stack buffer overflow has been identified in the AsIO3.sys driver. This vulnerability can be triggered by input manipulation, may …

CVE-2026-90442