CVE-2025-13943

HIGH

Zyxel EX3301-T0 <5.50(ABVY.7)C0 - Command Injection

Title source: llm

Exploitation Summary

EIP tracks 1 public exploit for CVE-2025-13943. PoCs published by hacefresko.

AI-analyzed exploit summary The repository contains a functional exploit for CVE-2025-13943, an authenticated command injection vulnerability in Zyxel routers' `zhttpd` binary. The exploit leverages the `EXPORT_LOG` action in the `/cgi-bin/LogResult` endpoint to execute arbitrary commands via unsanitized log content from packet captures.

Description

A post-authentication command injection vulnerability in the log file download function of the Zyxel EX3301-T0 firmware versions through 5.50(ABVY.7)C0 could allow an authenticated attacker to execute operating system (OS) commands on an affected device.

Exploits (1)

github WORKING POC 5 stars

by hacefresko · pythonpoc

https://github.com/hacefresko/CVEs/tree/main/CVE-2025-13943

View Code ZIP pw:eip

The repository contains a functional exploit for CVE-2025-13943, an authenticated command injection vulnerability in Zyxel routers' `zhttpd` binary. The exploit leverages the `EXPORT_LOG` action in the `/cgi-bin/LogResult` endpoint to execute arbitrary commands via unsanitized log content from packet captures.

Classification

Working Poc 95%

Attack Type

Rce

Complexity

Moderate

Reliability

Reliable

Target: Zyxel zhttpd (multiple router models)

Auth required

Prerequisites: valid credentials for the router's web interface · network access to the target device

MITRE ATT&CK

T1190 - Exploit Public-Facing Application T1059 - Command and Scripting Interpreter T1203 - Exploitation for Client Execution

devstral-2 · analyzed Feb 27, 2026 Full analysis →

References (1)

Core 1

Core References

Various Sources vendor-advisory

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-null-pointer-dereference-and-command-injection-vulnerabilities-in-certain-4g-lte-5g-nr-cpe-dsl-ethernet-cpe-fiber-onts-security-routers-and-wireless-extenders-02-24-2026

Scores

CVSS v3 8.8

EPSS 0.0134

EPSS Percentile 67.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-78

Status published

Products (50)

zyxel/am7510-00_firmware < 5.63\(acoe.0.1\)c0

zyxel/ax7501-b1_firmware < 5.17\(abpc.7.1\)c0

zyxel/dm4200-b0_firmware < 5.17\(acbs.1.6\)c0

zyxel/dx3300-t0_firmware < 5.50\(abvy.7.1\)c0

zyxel/dx3300-t1_firmware < 5.50\(abvy.7.1\)c0

zyxel/dx3301-t0_firmware < 5.50\(abvy.7.1\)c0

zyxel/dx4510-b0_firmware < 5.17\(abyl.10.1\)c0

zyxel/dx4510-b1_firmware < 5.17\(abyl.10.1\)c0

zyxel/dx5401-b1_firmware < 5.17\(abyo.7.1\)c0

zyxel/ee3301-00_firmware < 5.63\(acmu.2.1\)c0

... and 40 more

Published Feb 24, 2026

Tracked Since Feb 24, 2026