Stack-Based Buffer Overflow in Tenda W6-S by Tenda
CVE-2025-15255

9.3CRITICAL

Key Information:

Vendor

Tenda
Status
W6-s
Vendor
CVE Published:
30 December 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-15255?

A vulnerability has been identified in the Tenda W6-S model 1.0.0.4(510), specifically in the R7websSsecurityHandler component of the /bin/httpd file. This issue arises due to improper handling of the Cookie argument, which can be exploited to trigger a stack-based buffer overflow. Attackers can remotely exploit this vulnerability, making it crucial for users of the affected product to take immediate action to protect their systems. The exploit for this vulnerability has been publicly disclosed and poses a significant risk.

Affected Version(s)

W6-S 1.0.0.4(510)

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-2025-15255 - Proof of Concept

References

https://vuldb.com/?id.338645
vdb-entrytechnical-description
https://vuldb.com/?ctiid.338645
signaturepermissions-required
https://vuldb.com/?submit.725500
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
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

dwbruijn (VulDB User)
JSON
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CVE-2025-15255 : Stack-Based Buffer Overflow in Tenda W6-S by Tenda