Is this vulnerability remotely exploitable?

Yes, once an attacker has obtained the APP_KEY and can interact with endpoints protected by `TokenAuth`, they can remotely generate and use valid tokens to access accounts.

What level of access does an attacker need to exploit this issue?

The attacker needs access to the application's APP_KEY, which may be exposed through misconfigurations, leaked environment variables, backups, or prior server compromise. No knowledge of user passwords is required once APP_KEY is known.

What is the safest general fix pattern for this type of vulnerability?

Replace deterministic token schemes with cryptographically secure, random tokens that are stored server-side with explicit expiry and revocation. Avoid using global secrets and predictable fields as the primary basis for authentication tokens.

Severity:

CRITICAL RISK

(9.8)

Predictable Token-Based Authentication (CWE-330) in FreeScout TokenAuth Middleware

CVE-2026-27637

Published:

Feb 24, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Predictable Authentication Token

CWE:

CWE-330

Impact:

Authentication Bypass and Account Takeover

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Predictable Authentication Token

CWE:

CWE-330

Impact:

Authentication Bypass and Account Takeover

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

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355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Predictable Token-Based Authentication (CWE-330) in FreeScout TokenAuth Middleware

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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