Information Disclosure Vulnerability in Tenda AC21 Web Management Interface
CVE-2026-2148

6.9MEDIUM

Key Information:

Vendor

Tenda
Status
Ac21
Vendor
CVE Published:
8 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2148?

A security vulnerability has been identified in the Tenda AC21, specifically within the web management interface at the /cgi-bin/DownloadFlash endpoint. This vulnerability allows unauthorized access to sensitive information due to improper handling of requests. An attacker could potentially exploit this vulnerability remotely, leading to exposure of confidential data. Public disclosure of the exploit means that protective measures should be adopted promptly to safeguard the affected systems.

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Affected Version(s)

AC21 16.03.08.16

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-2026-2148 - Proof of Concept

References

https://vuldb.com/?id.344850
vdb-entry
https://vuldb.com/?ctiid.344850
signaturepermissions-required
https://vuldb.com/?submit.747557
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
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

jiefengliang (VulDB User)
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