Is CVE-2026-123961 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-123961 being exploited in the wild.

How severe is CVE-2026-123961?

Critical severity, with a CVSS score of 9.9, published 7 November 2026.

Is there a fix for CVE-2026-123961?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-123961 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-123961?

Check whether you run TOTOLINK CA300-PoE at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-123961: TOTOLINK CA300-PoE buffer overflow in setWiFiBasicConfig

CVE-2026-123961 · Severity: critical · CVSS 9.9 · Published 2026-11-07

A buffer overflow vulnerability exists in TOTOLINK CA300-PoE, a network access point used to provide wireless connectivity in office and campus environments. An attacker on the network can exploit this flaw through a malicious request to remotely execute code on the device, potentially compromising network access and connected systems. The vulnerability has been publicly disclosed and may already be exploited.

Technologies: TOTOLINK CA300-PoE. Vendors: TOTOLINK.

Quick answers

Is CVE-2026-123961 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-123961 being exploited in the wild.
How severe is CVE-2026-123961?: Critical severity, with a CVSS score of 9.9, published 7 November 2026.
Which products and versions are affected?: TOTOLINK CA300-PoE 6.2c.884.
Is there a fix for CVE-2026-123961?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-123961 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-123961?: Check whether you run TOTOLINK CA300-PoE at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A buffer overflow vulnerability in the setWiFiBasicConfig function of /cgi-bin/cstecgi.cgi allows remote code execution through manipulation of the KeyStr parameter. The vulnerability requires network access to the device but no authentication. Successful exploitation grants arbitrary code execution on the device.

Affected products

TOTOLINK CA300-PoE 6.2c.884

Timeline

2026-11-07: disclosed
2026-11-07: advisory

References

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