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Critical severity · published Dec 10, 2025
CVE-2025-13184
Unauthenticated Telnet enablement via cstecgi.cgi (auth bypass) leading to unauthenticated root login with a blank password
9.8
CVSS
20.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)20.1% · higher than 97% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
XA
X5000R's (AX1800 router) · Toto Link
before V9.1.0u.6369_B20230113 · source: vendor
XF
X5000r Firmware · Totolink
9.1.0u.6369_b20230113 · source: NVD
Affected product
XA
X5000R's (AX1800 router)
Toto Link
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-13184
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-13184
Exploit
https://hackingbydoing.wixsite.com/hackingbydoing/post/totolink-x5000r-ax1800-router-authentication-bypass
Third Party Advisory
https://www.kb.cert.org/vuls/id/821724