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Description

A weakness has been identified in TOTOLINK A3700R 9.1.2u.5822_B20200513. This affects the function setWiFiEasyGuestCfg of the file /cgi-bin/cstecgi.cgi. Executing a manipulation of the argument ssid can lead to buffer overflow. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks.

PUBLISHED Reserved 2026-01-18 | Published 2026-01-19 | Updated 2026-02-23 | 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

9.1.2u.5822_B20200513
affected

Timeline

2026-01-18:Advisory disclosed
2026-01-18:VulDB entry created
2026-01-19:VulDB entry last update

Credits

wxhwxhwxh_mie (VulDB User) reporter

References

vuldb.com/?id.341735 (VDB-341735 | TOTOLINK A3700R cstecgi.cgi setWiFiEasyGuestCfg buffer overflow) vdb-entry technical-description

vuldb.com/?ctiid.341735 (VDB-341735 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/?submit.735502 (Submit #735502 | TOTOLINK A3700R V9.1.2u.5822_B20200513 Buffer Overflow) third-party-advisory

lavender-bicycle-a5a.notion.site/...d5eaaff?source=copy_link exploit

www.totolink.net/ product

cve.org (CVE-2026-1143)

nvd.nist.gov (CVE-2026-1143)

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