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CVE-2026-124060

TOTOLINK CA300-PoE cstecgi.cgi UploadCustomModule buffer overflow

  • Critical 9.4
  • A public exploit reference is listed

Description

A vulnerability was detected in TOTOLINK CA300-PoE 6.2c.884. Affected by this issue is the function UploadCustomModule of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument File results in buffer overflow. The attack may be launched remotely. The exploit is now public and may be used.

Key facts

Published
7 Nov 2026
Last changed
9 Nov 2026
Assigned by
VulDB
EPSS
0.503% likely to be exploited in the next 30 days, higher than 43.612% of CVEs (scores for 15 Nov 2026)
SSVC (CISA)
Exploitation: poc; Automatable: no; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

  • 9.4CVSS 4.0, Criticalfrom the CNA (VulDB)CVSS: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
  • 9.1CVSS 3.1, Criticalfrom the CNA (VulDB)CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C
  • 9.1CVSS 3.0, Criticalfrom the CNA (VulDB)CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C
  • 8.3CVSS 2.0, Highfrom the CNA (VulDB)AV:N/AC:L/Au:M/C:C/I:C/A:C/E:POC/RL:ND/RC:C

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

No explicit remediation statement is available on this page yet. Consult the original record and vendor references before choosing a fix.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

VendorProductVersions
TOTOLINKCA300-PoE
  • 6.2c.884 (affected)

Timeline

  1. 6 Nov 2026 Advisory disclosed
  2. 6 Nov 2026 VulDB entry created
  3. 6 Nov 2026 VulDB entry last update
  4. 7 Nov 2026 Published

Weakness

References