CVE-2021-26087

Description

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.

Remediation

Solution:

  • Please upgrade to FortiWLC version 8.6.1 or above. Please upgrade to FortiWLC version 8.5.4 or above.

Category

4.3
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.04%
Affected: Fortinet FortiWLC
Published at:
Updated at:

References

Link Tags
https://fortiguard.fortinet.com/psirt/FG-IR-20-137

Frequently Asked Questions

What is the severity of CVE-2021-26087?
CVE-2021-26087 has been scored as a medium severity vulnerability.
How to fix CVE-2021-26087?
To fix CVE-2021-26087: Please upgrade to FortiWLC version 8.6.1 or above. Please upgrade to FortiWLC version 8.5.4 or above.
Is CVE-2021-26087 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-26087 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-26087?
CVE-2021-26087 affects Fortinet FortiWLC.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.