OS Command Injection in Tenda AC8 Router's Web Interface
CVE-2026-4253

5.1MEDIUM

Key Information:

Vendor

Tenda
Status
Ac8
Vendor
CVE Published:
16 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4253?

A security vulnerability has been identified in the Tenda AC8 router, specifically affecting version 16.03.50.11. This flaw is found in the route_set_user_policy_rule function within the /cgi-bin/UploadCfg component of the web interface. By manipulating the wans.policy.list1 argument, an attacker can execute arbitrary OS commands, potentially allowing for remote exploitation. The exploit is publicly available, increasing the risk of attacks against this device.

Affected Version(s)

AC8 16.03.50.11

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-4253 - Proof of Concept

References

https://vuldb.com/?id.351211
vdb-entrytechnical-description
https://vuldb.com/?ctiid.351211
signaturepermissions-required
https://vuldb.com/?submit.771771
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

DigitalAndrew (VulDB User)
.