High severity · published May 4, 2026
CVE-2026-7749
Totolink N300RH POST Request cstecgi.cgi setWanConfig buffer overflow
8.8
CVSS
0.6%
EPSS
No
On KEV
Description
A security vulnerability has been detected in Totolink N300RH 3.2.4-B20220812. This affects the function setWanConfig of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument priDns leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 47% 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-2026-7749
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-7749
lavender-bicycle-a5a.notion.site
https://lavender-bicycle-a5a.notion.site/TOTOLINK-N300RH-setWanConfig-34553a41781f80ed8500d9b8d54074f2
vuldb.com
https://vuldb.com/submit/807203
vuldb.com
https://vuldb.com/vuln/360924
vuldb.com
https://vuldb.com/vuln/360924/cti
www.totolink.net
https://www.totolink.net/
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