Stack-Based Buffer Overflow in Tenda A18 Httpd Service
CVE-2026-2877

8.7HIGH

Key Information:

Vendor

Tenda
Status
A18
Vendor
CVE Published:
21 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2877?

A remote code execution vulnerability exists in the Tenda A18's Httpd Service due to improper handling in the strcpy function within the WifiExtraSet component. An attacker can exploit this flaw by manipulating the wpapsk_crypto5g argument, leading to a stack-based buffer overflow. This vulnerability allows for potential remote attacks, further risking the integrity and security of affected systems. Users should be cautious and consider applying necessary patches or workarounds to mitigate associated risks.

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Affected Version(s)

A18 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-2026-2877 - Proof of Concept

References

https://vuldb.com/?id.347130
vdb-entrytechnical-description
https://vuldb.com/?ctiid.347130
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https://vuldb.com/?submit.754703
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
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

942384053 (VulDB User)
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