CVE-2021-26087: Fortinet Fortiwlc

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

An improper neutralization of input during web page generation in FortiWLC version 8.6.0, version 8.5.3 and below, version 8.4.8 and below, version 8.3.3 web interface may allow both authenticated remote attackers and non-authenticated attackers in the same network as the appliance to perform a stored cross site scripting attack (XSS) via injecting malicious payloads in different locations.

Affected products

• Fortinet Fortiwlc: from 8.4.0, up to and including 8.4.2; from 8.4.4, before 8.5.4 (fixed in 8.5.4); version 8.3.3 only; version 8.6.0 only

Published 2025-03-17. Last modified 2026-06-17.