TI-2026-22018 Aliases CVE-2026-27636

FreeScout: Missing .htaccess in Restricted File Extensions Allows Remote Code Execution on Apache

HIGH 73CWE-434Published 2026-02-25 · Updated 2026-02-25

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: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-434.

Summary

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.206, FreeScout's file upload restriction list in `app/Misc/Helper.php` does not include `.htaccess` or `.user.ini` files. On Apache servers with `AllowOverride All` (a common configuration), an authenticated user can upload a `.htaccess` file to redefine how files are processed, enabling Remote Code Execution. This vulnerability can be exploited on its own or in combination with CVE-2026-27637. Version 1.8.206 fixes both vulnerabilities.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.02218 82nd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed freescout (freescout-help-desk): 1.8.206

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
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
freescout-help-desk	freescout	before 1.8.206	1.8.206	Patch available	CNA

freescout Vendorfreescout-help-desk Affected before 1.8.206 Fixed in 1.8.206 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:freescout:freescout::::::::	before 1.8.206	Vulnerable	freescout-help-desk

cpe:2.3:a:freescout:freescout:*:*:*:*:*:*:*:* Versions before 1.8.206 Vulnerable ·freescout-help-desk

Remediation

Fix · CNA freescout (freescout-help-desk) Fixed in 1.8.206

Timeline

2026-10-02 Threatist record created from CVE-2026-27636

References

TI-2026-22019 FreeScout's Predictable Authentication Token Enables Account Takeover CVSS 3.1CRITICAL 9.8
TI-2026-29249 FreeScout has Authentication Bypass and Information Disclosure in SystemController via /system/cron CVSS 4.0HIGH 8.9
TI-2026-29247 FreeScout has Predictable Attachment Token that Allows Unauthenticated Private File Download via Brute Force CVSS 4.0HIGH 8.8
TI-2026-25245 FreeScout: Stored XSS via Unescaped Email Template Rendering ({!! $thread->body !!}) CVSS 3.1CRITICAL 9.3
TI-2026-22596 FreeScout 1.8.206 Patch Bypass for CVE-2026-27636 via Zero-Width Space Character Leads to Remote Code Execution CVSS 3.1CRITICAL 10.0
TI-2024-19354 FreeScout OS Command Injection vulnerability CVSS 3.1CRITICAL 9.1

See all 45 →

Sources

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