Medium severity · published Mar 17, 2025
CVE-2021-26087
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…
6.1
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
Fortiwlc · Fortinet
8.4.0 through 8.4.2; 8.4.4 before 8.5.4; 8.3.3; 8.6.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26087
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-26087
Vendor Advisory
https://fortiguard.fortinet.com/psirt/FG-IR-20-137
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