High 8.8Published Jan 19, 2026

CVE-2026-1143TOTOLINK A3700R cstecgi.cgi setWiFiEasyGuestCfg buffer overflow

Updated under an hour ago (Oct 27, 2026, 9:40 AM ET)

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It affects TOTOLINK A3700R. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for TOTOLINK A3700R

Exploited in the last 30 days

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.

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
Weakness (CWE): CWE-120, CWE-119
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Analyzed
Record last updated: Feb 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

TOTOLINK A3700R totolink:a3700r_firmware	9.1.2u.5822_B20200513	CNA record
totolink a3700r_firmware totolink:a3700r_firmware	9.1.2u.5822_b20200513	NVD

References

References

https://vuldb.com/?id.341735	vdb-entry, technical-description, third-party-advisory
https://vuldb.com/?ctiid.341735	signature, permissions-required, vdb-entry
https://vuldb.com/?submit.735502	third-party-advisory, vdb-entry
https://lavender-bicycle-a5a.notion.site/TOTOLINK-A3700R-setWiFiEasyGuestCfg-2e353a41781f8057a244ead07d5eaaff?source=copy_link	exploit, third-party-advisory
https://www.totolink.net/	product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.