CVE-2018-11714

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 67.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2018-06-04 · updated 2026-06-17
Weakness: CWE-384

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.

Affected products

TP-Link Tl-Wr840N Firmware: 0.9.1_3.16
TP-Link TL-WR841N: 0.9.1_4.16

References

http://blog.securelayer7.net/time-to-disable-tp-link-home-wifi-router/
https://www.exploit-db.com/exploits/44781/
http://blog.securelayer7.net/time-to-disable-tp-link-home-wifi-router/
https://www.exploit-db.com/exploits/44781/

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