CVE-2026-124058

TOTOLINK CA300-PoE cstecgi.cgi setWiFiRepeaterConfig buffer overflow

9.4 Critical

A weakness has been identified in TOTOLINK CA300-PoE 6.2c.884. Affected is the function setWiFiRepeaterConfig of the file /cgi-bin/cstecgi.cgi. Executing a manipulation of the argument ApCliKeyStr can lead to buffer overflow. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: High
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

What each source reports

CVE List Score used 9.4

TOTOLINK CA300-PoE cstecgi.cgi setWiFiRepeaterConfig buffer overflow

Record: CVE-2026-124058
CVSS 4.0: 9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C
CVSS 3.0: 9.1 CriticalCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C
CVSS 2.0: 8.3 AV:N/AC:L/Au:M/C:C/I:C/A:C/E:POC/RL:ND/RC:C
Weakness: CWE-120, CWE-119
Updated: 2026-11-07

EUVDEUVD-2026-119325 9.4

Record: EUVD-2026-119325
CVSS 4.0: 9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
Updated: 2026-11-08

GitHub AdvisoriesGHSA-wr9v-cwjw-49x5 8.5

A weakness has been identified in TOTOLINK CA300-PoE 6.2c.884. Affected is the function...

Record: GHSA-wr9v-cwjw-49x5
CVSS 4.0: 8.5 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-119
Updated: 2026-11-07

NVD 8.5

Record: CVE-2026-124058
CVSS 4.0: 8.5 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS 2.0: 8.3 HighAV:N/AC:L/Au:M/C:C/I:C/A:C
Weakness: CWE-119, CWE-120
Updated: 2026-11-07

Affected products

totolink ca300-poe

History

History
Recorded	Changed	Sources
Nov 8, 2026	published	EUVD
Nov 7, 2026	published	EUVD, NVD
Nov 7, 2026	aliases, references	GitHub Advisories
Nov 7, 2026	cwes, references, severity, title	CVE List
Nov 7, 2026	first indexed	EUVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-124058 is a critical vulnerability (CVSS 9.4) in Totolink Ca300-poe, published November 7, 2026. No source lists public exploit code. No source names a fixed version.