CVE-2018-25317

Tenda W3002R/A302/W309R wireless routers version V5.07.64_en contain a cookie session weakness vulnerability that allows unauthenticated attackers to modify DNS settings by exploiting insufficient session validation. Attackers can send GET requests to the /goform/AdvSetDns endpoint with a crafted admin language cookie to change primary and secondary DNS servers, redirecting user traffic to malicious DNS servers.

CVSS 4.0

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

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.7% chance of exploitation in the next 30 days; higher than 50% of CVEs (scores of 2026-10-25)

CWE

CWE-290

Published

2026-04-29

Modified

2026-09-30

Record from

the NVD, synced 2026-10-19

Affected

• tenda:a302_firmware
• tenda:w3002r_firmware
• tenda:w309r_firmware

References

• https://www.exploit-db.com/exploits/44380
• https://www.vulncheck.com/advisories/tenda-w3002r-a302-w309r-64-en-cookie-session-weakness-dns-change

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