Description
Unauthenticated Telnet enablement via cstecgi.cgi (auth bypass) leading to unauthenticated root login with a blank password on factory/reset X5000R V9.1.0u.6369_B20230113 (arbitrary command execution). Earlier versions that share the same implementation, may also be affected.
Affected products
totolink: x5000r firmware; totolink: x5000r
References2
- hackingbydoing.wixsite.com/hackingbydoing/post/totolink-x5000r-… ExploitThird Party Advisory
- www.kb.cert.org/vuls/id/821724 Third Party Advisory
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 21% percentile: 98 · as of 11 November 2026
- CWE
- CWE-863
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.