CVE-2018-25318

CRITICAL

Tenda FH303/A300 V5.07.68_EN Cookie Session Weakness DNS Change

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-25318. PoCs published by Todor Donev.

AI-analyzed exploit summary This PoC exploits a weak cookie session mechanism in Tenda FH303/A300 routers to remotely change DNS settings via a crafted HTTP request. The vulnerability allows unauthenticated attackers to redirect traffic by modifying DNS configurations.

Description

Tenda FH303/A300 firmware V5.07.68_EN contains a session weakness vulnerability that allows unauthenticated attackers to modify DNS settings by exploiting insufficient cookie validation. Attackers can send GET requests to the /goform/AdvSetDns endpoint with a crafted admin cookie to change DNS servers and redirect user traffic to malicious sites.

Exploits (1)

exploitdb WORKING POC
by Todor Donev · textwebappsasp
https://www.exploit-db.com/exploits/44381

This PoC exploits a weak cookie session mechanism in Tenda FH303/A300 routers to remotely change DNS settings via a crafted HTTP request. The vulnerability allows unauthenticated attackers to redirect traffic by modifying DNS configurations.

Classification
Working Poc 95%
Attack Type
Other
Complexity
Trivial
Reliability
Reliable
Target: Tenda FH303/A300 Firmware V5.07.68_EN
No auth needed
Prerequisites: network access to the target router
devstral-2 · analyzed Apr 30, 2026 Full analysis →

References (2)

Core 2
Core References
Exploit exploit
ExploitDB-44381
https://www.exploit-db.com/exploits/44381
Third Party Advisory third-party-advisory
VulnCheck Advisory: Tenda FH303/A300 V5.07.68_EN Cookie Session Weakness DNS Change
https://www.vulncheck.com/advisories/tenda-fh303-a300-68-en-cookie-session-weakness-dns-change

Scores

CVSS v3 9.8
EPSS 0.0065
EPSS Percentile 46.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact total

Details

CWE
CWE-290
Status published
Products (3)
tenda/a300_firmware 5.07.68_en
Tenda/FH303/A300 5.07.68
tenda/fh303_firmware 5.07.68_en
Published Apr 29, 2026
Tracked Since Apr 30, 2026