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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.

PUBLISHED Reserved 2026-05-03 | Published 2026-05-04 | Updated 2026-05-04 | Assigner VulDB




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
HIGH: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
HIGH: 8.8CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
9.0AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR

Problem types

Buffer Overflow

Memory Corruption

Product status

3.2.4-B20220812
affected

Timeline

2026-05-03:Advisory disclosed
2026-05-03:VulDB entry created
2026-05-03:VulDB entry last update

Credits

wxhwxhwxh_mie (VulDB User) reporter

References

vuldb.com/vuln/360924 (VDB-360924 | Totolink N300RH POST Request cstecgi.cgi setWanConfig buffer overflow) vdb-entry technical-description

vuldb.com/vuln/360924/cti (VDB-360924 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/submit/807203 (Submit #807203 | Totolink N300RH N300RH V3_Firmware V3.2.4-B20220812 Buffer Overflow) third-party-advisory

lavender-bicycle-a5a.notion.site/...781f80ed8500d9b8d54074f2 exploit

www.totolink.net/ product

cve.org (CVE-2026-7749)

nvd.nist.gov (CVE-2026-7749)

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