CVE-2026-123960
9.9, criticalTOTOLINK CA300-PoE Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability
- CVSS
- 9.9, critical critical CVSS v3.1
- EPSS, next 30 days
- 0.8% higher than 56.6% of scored CVEs
- Exploitation
- No public evidence
- Published
- 7 Nov 2026yesterday
Description
A weakness has been identified in TOTOLINK CA300-PoE 6.2c.884. This affects the function setWanConfig of the file /cgi-bin/cstecgi.cgi. Executing a manipulation of the argument pppoeUser/priDns/secDns 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.
Details
- Vendor
- TOTOLINK
- Product
- CA300-PoE
- Weakness
- CWE-119 (opens in a new tab)
- Status
- Deferred
- Updated
- 7 Nov 2026
- Assigner
- cna@vuldb.com
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
References 6
Other references 6
- lavender-bicycle-a5a.notion.site /TOTOLINK-CA300-PoE-setWanConfig-3f953a41781f80ec86f3c2840cb5fc4b?source=copy_link (opens in a new tab)
- vuldb.com /cve/CVE-2026-123960 (opens in a new tab)
- vuldb.com /submit/1033722 (opens in a new tab)
- vuldb.com /vuln/432023 (opens in a new tab)
- vuldb.com /vuln/432023/cti (opens in a new tab)
- totolink.net (opens in a new tab)
The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.
Other TOTOLINK CVEs
Every TOTOLINK CVE we holdSame vendor in what we hold, not a known link between the flaws.
- CVE-2026-123957 TOTOLINK CA300-PoE Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability EPSS 0.5% 9.9, critical
- CVE-2026-123958 TOTOLINK CA300-PoE Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability EPSS 0.5% 9.9, critical
- CVE-2026-123959 TOTOLINK CA300-PoE Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability EPSS 0.8% 9.1, critical
- CVE-2026-123961 TOTOLINK CA300-PoE Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability 9.9, critical
- CVE-2026-124057 TOTOLINK CA300-PoE Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability 9.1, critical
- CVE-2026-124058 TOTOLINK CA300-PoE Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability 9.1, critical
- CVE-2026-124059 TOTOLINK CA300-PoE Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability 9.1, critical
- CVE-2026-124060 TOTOLINK CA300-PoE Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability 9.1, critical
Beyond this page
Is CVE-2026-123960 in your network?
This page tells you how dangerous CVE-2026-123960 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.
-
EXYS7600 OCELOT
Find it before attackers do
Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-123960 comes with the devices to patch.
Learn more about EXYS7600 OCELOT -
EXYS7950 KONDRA
Detect it if it's exploited
Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.
Learn more about EXYS7950 KONDRA
Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 8 Nov 2026, not the live upstream state.