PT-2026-36794 · Totolink · N300Rh

Wxhwxhwxh_Mie · Published 2026-05-04 · Updated 2026-05-04 · CVE-2026-7749

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Totolink N300RH version 3.2.4-B20220812

Description A buffer overflow can be triggered remotely via the POST Request Handler component. The issue exists within the setWanConfig() function located in the '/cgi-bin/cstecgi.cgi' endpoint when manipulating the priDns argument.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability. As a temporary workaround, restrict access to the '/cgi-bin/cstecgi.cgi' endpoint or avoid using the priDns argument within the setWanConfig() function.

Exploit

Buffer Overflow

Weakness Enumeration

CWE-120

CWE-119

Related Identifiers

CVE-2026-7749

Affected Products

N300Rh

References · 8

• 🔥 https://lavender-bicycle-a5a.notion.site/TOTOLINK-N300RH-setWanConfig-34553a41781f80ed8500d9b8d54074f2 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-7749 · Security Note
• https://twitter.com/VulmonFeeds/status/2051260274892476915 · Twitter Post
• https://vuldb.com/vuln/360924/cti · Note
• https://reddit.com/r/pwnhub/comments/1t3io0u/critical_buffer_overflow_vulnerability_discovered · Reddit Post
• https://vuldb.com/submit/807203 · Note
• https://vuldb.com/vuln/360924 · Note
• https://totolink.net · Note