Session Weakness Vulnerability in Tenda FH303/A300 by Tenda
CVE-2018-25318

9.3CRITICAL

Key Information:

Vendor

Tenda
Status
Fh303/a300
Vendor
CVE Published:
29 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2018-25318?

The Tenda FH303/A300 firmware version V5.07.68_EN exposes a session weakness that may enable unauthorized individuals to alter DNS settings. This vulnerability arises from inadequate cookie validation, allowing attackers to utilize specially crafted admin cookies to send GET requests to the /goform/AdvSetDns endpoint. Consequently, this can lead to the redirection of user traffic to potentially harmful websites, emphasizing the need for robust security measures and timely updates.

Affected Version(s)

FH303/A300 5.07.68

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-2018-25318 - Proof of Concept

References

https://www.exploit-db.com/exploits/44381
exploit
https://www.vulncheck.com/advisories/tenda-fh303-a300-68-...
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

.