CVE-2026-86105

An improper authorization vulnerability in Fireware OS's Access Portal reverse proxy allows an authenticated,…

An improper authorization vulnerability in Fireware OS's Access Portal reverse proxy allows an authenticated, low-privileged Access Portal user to access other web applications they are not authorized for by sending a specially crafted request for a different resource which they are authorized to access.

Vendor: watchguard
Product: fireware
CVSS 3.1: 7.1 (high), scored by NVD (primary)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
CVSS 4.0: 6 (medium), scored by 5d1c2695-1a31-4499-88ae-e847036fd7e3CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE: CWE-22, CWE-176, CWE-285
Published: 2026-09-30
NVD modified: 2026-10-06
NVD status: Analyzed

Not in the CISA KEV catalogue at the last update.

EPSS

0.31% chance of exploitation in the next 30 days (percentile 22nd)

FIRST EPSS, updated 17 Oct 2026. About EPSS

CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.

References

psirt.watchguard.com (Patch, Vendor Advisory)

Data last updated 18 Oct 2026. Sources: NVD API 2.0, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.