Is this vulnerability remotely exploitable?

Yes, it is remotely exploitable, but only by users who can authenticate as an uploader (or any role permitted to call the encoder image receive endpoint). Once authenticated, an attacker can craft requests that force the server to read local files and re-serve them as GIFs.

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

The attacker must have valid credentials with permissions to upload or trigger poster/thumbnail generation through `aVideoEncoderReceiveImage.json.php`. Anonymous users do not typically have direct access to this endpoint, but weak account management or shared credentials can lower this barrier.

What is the safest general fix pattern for developers?

The safest fix is to treat all inbound paths and URLs as untrusted, perform canonicalization on the server side, and enforce that any filesystem access is restricted to an explicit, allowlisted directory tree. Any path that resolves outside the designated media directories should be rejected before reaching file-reading routines, including special-case branches such as GIF handling.

Severity:

HIGH RISK

(7.6)

Path Traversal File Read (CWE-22) in WWBN AVideo GIF Poster Handling

CVE-2026-39369

Published:

Apr 7, 2026

Status:

Undergoing Analysis

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

CRITICAL RISK

CRITICAL

(9.8)

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

Remote Code Execution on the Router

April 12, 2026

CWE-77;CWE-78

CRITICAL RISK

CRITICAL

(9.8)

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

Remote Code Execution on the Router

April 12, 2026

Vulnerability Type

Category:

Path Traversal / Arbitrary File Read

CWE:

CWE-22

Impact:

Arbitrary File Read and Sensitive Data Exposure

Severity:

HIGH RISK

(7.6)

CVSS Version:

3.1

Vulnerability Type

Category:

Path Traversal / Arbitrary File Read

CWE:

CWE-22

Impact:

Arbitrary File Read and Sensitive Data Exposure

Severity:

HIGH RISK

(7.6)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

Detect vulnerable code directly in pull requests, so CVEs are fixed before merge.

Get Started

Ship clean & secure code faster

START 14 DAYS FREE TRIAL

BOOK A DEMO

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Path Traversal File Read (CWE-22) in WWBN AVideo GIF Poster Handling

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

CRITICAL RISK

CRITICAL

(9.8)

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

CRITICAL RISK

CRITICAL

(9.8)

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

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Product

Pricing

Company

Legal

Developers

Compare

Product

Pricing

Company

Legal

Developers

Compare

Product

Pricing

Company

Legal

Developers

Compare