CVE-2026-103593

high

Description

A stack-based buffer overflow vulnerability in the Fireware OS logging service allows a network-adjacent attacker who can impersonate or intercept traffic to the configured log server to execute arbitrary code with root privileges by presenting a specially crafted certificate.

References

https://psirt.watchguard.com/CVE-2026-103593

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-111150

Details

Source: Mitre, NVD

Published: 2026-10-27

Updated: 2026-10-29

Risk Information

CVSS v2

Base Score: 8.3

Vector: CVSS2#AV:A/AC:L/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.8

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: High

CVSS v4

Base Score: 7.1

Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H

Severity: High

EPSS

EPSS: 0.001