CVE-2026-1143

HIGH
2026-01-19 [email protected]
8.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Jan 29, 2026 - 18:31 vuln.today
Public exploit code
CVE Published
Jan 19, 2026 - 07:16 nvd
HIGH 8.8

Tags

Buffer Overflow A3700r Firmware

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.

Analysis

Buffer overflow in TOTOLIK A3700R firmware version 9.1.2u.5822_B20200513 allows authenticated remote attackers to achieve complete system compromise through manipulation of the ssid parameter in the WiFi guest configuration function. Public exploit code exists for this vulnerability and no patch is currently available. …

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Remediation

Within 7 days: Identify all affected systems and apply vendor patches promptly. Monitor vendor channels for patch availability.

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Priority Score

64
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +44
POC: +20

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CVE-2026-1143 vulnerability details – vuln.today
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