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TI-2021-08039 Aliases CVE-2021-26087GHSA-jqg7-j926-j8mj

Cross-site scripting in Fortinet FortiWLC

Priority LOW 27CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00335 27th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
FortinetFortiWLC8.6.0; 8.5.0 – 8.5.3; 8.4.4 – 8.4.8; 8.4.0 – 8.4.2; 8.3.3—No fix listedCNA
  • FortiWLC VendorFortinet Affected 8.6.0; 8.5.0 – 8.5.3; 8.4.4 – 8.4.8; 8.4.0 – 8.4.2; 8.3.3 Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:fortinet:fortiwlc:*:*:*:*:*:*:*:*8.4.0 – 8.4.2; 8.4.4 to before 8.5.4VulnerableFortinet
cpe:2.3:a:fortinet:fortiwlc:8.3.3:*:*:*:*:*:*:*8.3.3VulnerableFortinet
cpe:2.3:a:fortinet:fortiwlc:8.6.0:*:*:*:*:*:*:*8.6.0VulnerableFortinet
  • cpe:2.3:a:fortinet:fortiwlc:*:*:*:*:*:*:*:* Versions 8.4.0 – 8.4.2; 8.4.4 to before 8.5.4 Vulnerable ·Fortinet
  • cpe:2.3:a:fortinet:fortiwlc:8.3.3:*:*:*:*:*:*:* Versions 8.3.3 Vulnerable ·Fortinet
  • cpe:2.3:a:fortinet:fortiwlc:8.6.0:*:*:*:*:*:*:* Versions 8.6.0 Vulnerable ·Fortinet

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-26087
  2. 2026-10-03 Alias added: GHSA-jqg7-j926-j8mj

References

Advisory 1

  • TI-2017-12817 Hard-coded credentials in Fortinet FortiWLC CVSS 3.0CRITICAL 9.8
  • TI-2017-12816 Hard-coded credentials in Fortinet FortiWLC CVSS 3.0CRITICAL 9.8
  • TI-2016-06996 Hard-coded credentials in Fortinet FortiWLC CVSS 3.0CRITICAL 9.1
  • TI-2016-06425 The rsyncd server in Fortinet FortiWLC 6.1-2-29 and earlier, 7.0-9-1, 7.0-10-0, 8.0-5-0… CVSS 3.0CRITICAL 9.8
  • TI-2021-18962 Incorrect authorization in Fortinet FortiWLC CVSS 3.1HIGH 8.8
  • TI-2017-05004 An OS Command Injection vulnerability in Fortinet FortiWLC 6.1-2 through 6.1-5, 7.0-7… CVSS 3.0HIGH 7.2
See all 13 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences