CVE-2026-1143

Name: CVE-2026-1143
Creator: NVD / NIST
Published: 2026-01-19T07:16:22.667+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 0.66%

Last modified Jun 17, 2026

CVE-2026-1143 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. 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. EPSS estimates a 0.66% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

7.4/10

CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.66%

46.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Totolink	A3700r Firmware	9.1.2u.5822_b20200513

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

Timeline

Published: Jan 19, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-1143?

How severe is CVE-2026-1143?

CVE-2026-1143 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 0.66% probability of exploitation in the next 30 days.

How do I fix CVE-2026-1143?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-1143?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST