Insufficient Data Authenticity in Tenda AC15 Firmware Update Handler
CVE-2025-8979

7.5HIGH

Key Information:

Vendor

Tenda
Status
Ac15
Vendor
CVE Published:
14 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-8979?

A security flaw has been identified in the Tenda AC15's firmware update mechanism, specifically within the functions check_fw_type, split_fireware, and check_fw. This vulnerability arises from insufficient verification of data authenticity, potentially allowing remote attackers to modify firmware updates. Although the complexity required to exploit this weakness is high, the public availability of the exploit could pose risks to users. It is crucial for users of the affected firmware version to apply necessary updates to mitigate potential threats.

Affected Version(s)

AC15 15.13.07.13

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-2025-8979 - Proof of Concept

References

https://vuldb.com/?id.319975
vdb-entrytechnical-description
https://vuldb.com/?ctiid.319975
signaturepermissions-required
https://vuldb.com/?submit.628602
third-party-advisory

CVSS V4

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

IOT_Res (VulDB User)
.
CVE-2025-8979 : Insufficient Data Authenticity in Tenda AC15 Firmware Update Handler