Critical severity · published May 4, 2026
CVE-2026-7747
Totolink N300RH Parameter cstecgi.cgi loginauth buffer overflow
9.8
CVSS
0.6%
EPSS
No
On KEV
Description
A security flaw has been discovered in Totolink N300RH 3.2.4-B20220812. Affected by this vulnerability is the function loginauth of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. Performing a manipulation of the argument Password results in buffer overflow. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks.
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)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
N3
N300RH · Totolink
3.2.4-B20220812 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-7747
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-7747
lavender-bicycle-a5a.notion.site
https://lavender-bicycle-a5a.notion.site/TOTOLINK-N300RH-loginauth_password-34553a41781f80c0ad36f4d95122fd40?pvs=73
vuldb.com
https://vuldb.com/submit/807201
vuldb.com
https://vuldb.com/vuln/360922
vuldb.com
https://vuldb.com/vuln/360922/cti
www.totolink.net
https://www.totolink.net/
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