CVE-2026-1143

HIGH 8.8

TOTOLINK A3700R cstecgi.cgi setWiFiEasyGuestCfg buffer overflow

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-120 CWE-119
Vendor	totolink
Product	a3700r
Published	Jan 19, 2026
Last Updated	Feb 23, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

TOTOLINK / A3700R

9.1.2u.5822_B20200513

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/?id.341735 vuldb.com: https://vuldb.com/?ctiid.341735 vuldb.com: https://vuldb.com/?submit.735502 lavender-bicycle-a5a.notion.site: https://lavender-bicycle-a5a.notion.site/TOTOLINK-A3700R-setWiFiEasyGuestCfg-2e353a41781f8057a244ead07d5eaaff?source=copy_link totolink.net: https://www.totolink.net/

Credits

🔍 wxhwxhwxh_mie (VulDB User)