# CVE-2021-26102

## Summary

- **CVE ID:** CVE-2021-26102
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:U/RC:C)
- **CWE:** CWE-305
- **Published:** Dec 19, 2024
- **Last Modified:** Mar 13, 2026

## Description

A relative path traversal vulnerability (CWE-23) in FortiWAN version 4.5.7 and below, 4.4 all versions may allow a remote non-authenticated attacker to delete files on the system by sending a crafted POST request. In particular, deleting specific configuration files will reset the Admin password to its default value.

## Affected Products

- Fortinet — FortiWAN (4.5.0)
- Fortinet — FortiWAN (4.4.0)

## References

- [CNA](https://fortiguard.fortinet.com/psirt/FG-IR-21-048)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 61.33%
- **EPSS Percentile:** 98.3

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._