Is CVE-2026-123960 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-123960 being exploited in the wild.

How severe is CVE-2026-123960?

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

Is there a fix for CVE-2026-123960?

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-2026-123960 attacked?

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

Am I affected by CVE-2026-123960?

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-2026-123960: TOTOLINK CA300-PoE buffer overflow in setWanConfig

CVE-2026-123960 · Severity: critical · CVSS 9.9 · Published 2026-11-07

TOTOLINK CA300-PoE is a network access point used to manage wireless connectivity in small offices and remote locations. A buffer overflow vulnerability in its web configuration interface allows a remote attacker to crash the device or execute arbitrary code by sending specially crafted requests, potentially leading to complete compromise of the network access point and the networks it serves.

Technologies: TOTOLINK CA300-PoE. Vendors: TOTOLINK.

Quick answers

Is CVE-2026-123960 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-123960 being exploited in the wild.
How severe is CVE-2026-123960?: 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-2026-123960?: 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-2026-123960 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-123960?: 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 exists in the setWanConfig function of /cgi-bin/cstecgi.cgi when processing the pppoeUser, priDns, or secDns arguments. The vulnerability can be triggered remotely without authentication and may allow code execution or denial of service. A proof-of-concept exploit has been publicly released.

Affected products

TOTOLINK CA300-PoE 6.2c.884

Timeline

2026-11-07: disclosed

References

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