High severity · published May 4, 2026
CVE-2026-7750
Totolink N300RH POST Request cstecgi.cgi setMacFilterRules buffer overflow
8.8
CVSS
0.5%
EPSS
No
On KEV
Description
A vulnerability was detected in Totolink N300RH 3.2.4-B20220812. This vulnerability affects the function setMacFilterRules of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument mac_address results in buffer overflow. The attack may be launched remotely. The exploit is now public 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)0.5% · higher than 40% 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-2026-7750
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-7750
lavender-bicycle-a5a.notion.site
https://lavender-bicycle-a5a.notion.site/TOTOLINK-N300RH-setMacFilterRules-34553a41781f809cb952cdcb71ce90d8
vuldb.com
https://vuldb.com/submit/807204
vuldb.com
https://vuldb.com/vuln/360925
vuldb.com
https://vuldb.com/vuln/360925/cti
www.totolink.net
https://www.totolink.net/
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