TI-2021-08065 Aliases CVE-2021-26115 GHSA-f6w7-3cg5-fhr8

OS command injection in Fortinet FortiWAN

LOW 37CWE-78Published 2024-12-19 · Updated 2024-12-20

Key facts

Attack vector: Local
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 OS command injection (CWE-78) vulnerability in FortiWAN version 4.5.7 and below Command Line Interface may allow a local, authenticated and unprivileged attacker to escalate their privileges to root via executing a specially-crafted command.An OS command injection (CWE-78) vulnerability in FortiWAN Command Line Interface may allow a local, authenticated and unprivileged attacker to escalate their privileges to root via executing a specially-crafted command.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00789 56th 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

Vendor	Product	Affected versions	Fixed in	Status	Source
Fortinet	FortiWAN	4.5.0 – 4.5.7; 4.4.0 – 4.4.1; 4.3.0 – 4.3.1; 4.2.5 – 4.2.7; 4.2.1 – 4.2.2; 4.1.1 – 4.1.3; 4.0.0 – 4.0.6	—	No fix listed	CNA

FortiWAN VendorFortinet Affected 4.5.0 – 4.5.7; 4.4.0 – 4.4.1; 4.3.0 – 4.3.1; 4.2.5 – 4.2.7; 4.2.1 – 4.2.2; 4.1.1 – 4.1.3; 4.0.0 – 4.0.6 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:fortinet:fortiwan::::::::	before 4.5.8	Vulnerable	Fortinet

cpe:2.3:a:fortinet:fortiwan:*:*:*:*:*:*:*:* Versions before 4.5.8 Vulnerable ·Fortinet

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-26115
2026-10-03 Alias added: GHSA-f6w7-3cg5-fhr8

References

Advisory 1

https://fortiguard.fortinet.com/psirt/FG-IR-21-069

TI-2021-08052 Authentication bypass in Fortinet FortiWAN CVSS 3.1CRITICAL 9.8
TI-2021-08064 SQL injection in Fortinet FortiWAN CVSS 3.1CRITICAL 9.8
TI-2021-08062 Out-of-bounds write in Fortinet FortiWAN CVSS 3.1CRITICAL 9.8
TI-2016-04287 Fortinet FortiWan (formerly AscernLink) before 4.2.5 allows remote authenticated users… CVSS 3.0HIGH 8.8
TI-2022-14879 OS command injection in Fortinet FortiWAN CVSS 3.1HIGH 8.8
TI-2021-06326 OS command injection in Fortinet FortiWAN CVSS 3.1HIGH 8.8

See all 15 →

Sources

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