Is CVE-2026-101354 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-101354 being exploited in the wild.

How severe is CVE-2026-101354?

Critical severity, with a CVSS score of 9.6, published 29 September 2026.

Is there a fix for CVE-2026-101354?

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-2026-101354 attacked?

It is attacked from the adjacent network, in a network appliance.

Am I affected by CVE-2026-101354?

Check whether you run Fast FAC1203R 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-2026-101354: FAST FAC1203R stack overflow in _tWlanTask

CVE-2026-101354 · Severity: critical · CVSS 9.6 · Published 2026-09-29

The FAST FAC1203R wireless router contains a stack overflow vulnerability in its wireless task handler that can be exploited by attackers on the local network. An attacker with network access can manipulate specific inputs to crash the device or potentially execute arbitrary code, causing service disruption or system compromise. The vulnerability affects version 20200116_2.0.4 and public exploit code has been released.

Vendors: Fast.

Quick answers

Is CVE-2026-101354 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-101354 being exploited in the wild.
How severe is CVE-2026-101354?: Critical severity, with a CVSS score of 9.6, published 29 September 2026.
Which products and versions are affected?: Fast FAC1203R 20200116_2.0.4.
Is there a fix for CVE-2026-101354?: 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-2026-101354 attacked?: It is attacked from the adjacent network, in a network appliance.
Am I affected by CVE-2026-101354?: Check whether you run Fast FAC1203R 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 stack-based buffer overflow exists in the _tWlanTask function of the MmtAtePrase Parser component, triggered through input manipulation. The vulnerability requires adjacent network access (local network) to exploit and has no authentication requirement. Successful exploitation can lead to code execution or denial of service on the affected device.

Affected products

FAST FAC1203R 20200116_2.0.4

Timeline

2026-09-29: disclosed
other: Public exploit code released

References

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