CVE-2018-11714
This issue is caused by improper session handling on the /cgi/ folder or a /cgi file.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 67.1%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
Description
An issue was discovered on TP-Link TL-WR840N v5 00000005 0.9.1 3.16 v0001.0 Build 170608 Rel.58696n and TL-WR841N v13 00000013 0.9.1 4.16 v0001.0 Build 170622 Rel.64334n devices. This issue is caused by improper session handling on the /cgi/ folder or a /cgi file. If an attacker sends a header of "Referer: http://192.168.0.1/mainFrame.htm" then no authentication is required for any action.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 67.06% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-384
- Affected
- tp-link/tl-wr840n firmware · tp-link/tl-wr841n firmware
- Source
- cve@mitre.org
EPSS moved from 31.9% on 21 September 2026 to 67.1% on 27 October 2026, peaking at 68.1% on 22 September 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- http://blog.securelayer7.net/time-to-disable-tp-link-home-wifi-router/Exploit, Third Party Advisory
- https://www.exploit-db.com/exploits/44781/Exploit, Third Party Advisory, VDB Entry
- http://blog.securelayer7.net/time-to-disable-tp-link-home-wifi-router/Exploit, Third Party Advisory
- https://www.exploit-db.com/exploits/44781/Exploit, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.