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Description

A weakness has been identified in Totolink N300RH 3.2.4-B20220812. Affected by this issue is the function setUpgradeFW of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. Executing a manipulation of the argument FileName can lead to buffer overflow. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks.

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/360923 (VDB-360923 | Totolink N300RH POST Request cstecgi.cgi setUpgradeFW buffer overflow) vdb-entry technical-description

vuldb.com/vuln/360923/cti (VDB-360923 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/submit/807202 (Submit #807202 | Totolink N300RH N300RH V3_Firmware V3.2.4-B20220812 Buffer Overflow) third-party-advisory

lavender-bicycle-a5a.notion.site/...bb1d1c627d7ff4329?pvs=73 exploit patch

www.totolink.net/ product

cve.org (CVE-2026-7748)

nvd.nist.gov (CVE-2026-7748)

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