CVE-2026-86105

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.

CVSS 4.0

6.0CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

7.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 23% of CVEs (scores of 2026-10-25)

CWEs

CWE-22, CWE-176, CWE-285

Published

2026-09-30

Modified

2026-10-06

Record from

the NVD, synced 2026-10-19

Affected

• watchguard:fireware

References

• https://psirt.watchguard.com/CVE-2026-86105

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