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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.

PUBLISHED Reserved 2026-04-29 | Published 2026-04-29 | Updated 2026-04-30 | Assigner VulnCheck




CRITICAL: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

Authentication Bypass by Spoofing

Product status

5.07.68
affected

References

www.exploit-db.com/exploits/44381 (ExploitDB-44381) exploit

www.vulncheck.com/...8-en-cookie-session-weakness-dns-change (VulnCheck Advisory: Tenda FH303/A300 V5.07.68_EN Cookie Session Weakness DNS Change) third-party-advisory

cve.org (CVE-2018-25318)

nvd.nist.gov (CVE-2018-25318)

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