PatchTheCVECVE-2018-25317: Tenda W3002R/A302/W309R wireless routers version V5.07.64_en contain a cookie session weakness vulnerability t
CVE-2018-25317 is a critical-severity flaw (CVSS 9.8) affecting w309r firmware, a302 firmware, w3002r firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Critical severity
- Public exploit reference
- CISA SSVC: automatable with total technical impact
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.7% (top 49%) |
| CISA exploited list | No |
| Weakness | CWE-290 |
| Published | 2026-04-29 |
| Last modified | 2026-09-30 |
Last updated 2026-09-30 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Exact fixes by distribution
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- Write-up: www.exploit-db.com/exploits/44380
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2018-25317?
w309r firmware: mitigate or apply the listed mitigation; a302 firmware: mitigate or apply the listed mitigation; w3002r firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2018-25317 being exploited?
CVE-2018-25317 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2018-25317 affect?
CVE-2018-25317 affects w309r firmware, a302 firmware, w3002r firmware. Severity is critical (CVSS 9.8). 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
How urgent is CVE-2018-25317?
Priority 60/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action