High 8.8Published Jan 19, 2026

CVE-2026-1143A weakness has been identified in TOTOLINK A3700R 9.1.2u.5822_B20200513.

Updated under an hour ago (2026-10-19 07:20 UTC)

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Every CVE for totolink a3700r_firmware

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, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-119, CWE-120
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jun 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

totolink a3700r_firmware totolink:a3700r_firmware	9.1.2u.5822_b20200513	NVD

References

https://lavender-bicycle-a5a.notion.site/TOTOLINK-A3700R-setWiFiEasyGuestCfg-2e353a41781f8057a244ead07d5eaaff?source=copy_linkexploit, third-party-advisory
https://vuldb.com/?ctiid.341735permissions-required, vdb-entry
https://vuldb.com/?id.341735third-party-advisory, vdb-entry
https://vuldb.com/?submit.735502third-party-advisory, vdb-entry
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.