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TI-2021-08066 Aliases CVE-2021-26116GHSA-5965-3x5m-9954

OS command injection in Fortinet FortiAuthenticator

Priority MEDIUM 41CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-78.

Summary

An improper neutralization of special elements used in an OS command vulnerability in the command line interpreter of FortiAuthenticator before 6.3.1 may allow an authenticated attacker to execute unauthorized commands via specifically crafted arguments to existing commands.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00623 50th 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
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
FortinetFortinet FortiAuthenticatorFortiAuthenticator before 6.3.1—No fix listedCNA
  • Fortinet FortiAuthenticator VendorFortinet Affected FortiAuthenticator before 6.3.1 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:fortinet:fortiauthenticator:*:*:*:*:*:*:*:*5.0.0 to before 6.3.1VulnerableFortinet
  • cpe:2.3:a:fortinet:fortiauthenticator:*:*:*:*:*:*:*:* Versions 5.0.0 to before 6.3.1 Vulnerable ·Fortinet

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-26116
  2. 2026-10-03 Alias added: GHSA-5965-3x5m-9954
  3. 2026-11-05 EPSS moved to the 50th–90th percentile

References

Advisory 1

  • TI-2026-32249 Improper access control in Fortinet FortiAuthenticator CVSS 3.1CRITICAL 9.1
  • TI-2021-05114 Uncontrolled resource consumption in Fortinet FortiSandbox, FortiAuthenticator CVSS 3.1HIGH 7.5
  • TI-2013-05746 FortiGuard FortiAuthenticator before 3.0 allows remote administrators to gain privileges via the command line interface. CVSS 2.0HIGH 9.0
  • TI-2021-19130 Information disclosure in Fortinet FortiAuthenticator CVSS 3.1HIGH 8.3
  • TI-2015-01319 Fortinet FortiAuthenticator 3.0.0 has a password of (1) slony for the slony PostgreSQL… CVSS 2.0HIGH 7.5
  • TI-2025-33341 Out-of-bounds read in Fortinet FortiAuthenticator CVSS 3.1HIGH 7.0
See all 23 →

Sources

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