Is CVE-2026-25275 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-25275 being exploited in the wild.

How severe is CVE-2026-25275?

High severity, with a CVSS score of 7.5, published 17 September 2026.

Is there a fix for CVE-2026-25275?

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-2026-25275 attacked?

It is attacked from the adjacent network, in device firmware.

Am I affected by CVE-2026-25275?

Check whether you run Qualcomm WiFi Chipset Firmware 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-2026-25275: Qualcomm WiFi chipset denial of service in FILS authentication frame handling

CVE-2026-25275 · Severity: high · CVSS 7.5 · Published 2026-09-17

Qualcomm's WiFi chipsets are vulnerable to a denial-of-service attack when processing malformed authentication frames that contain invalid FILS (Fast Initial Link Setup) information elements. An attacker on the network can send specially crafted WiFi authentication frames to cause the affected chipset to become temporarily unresponsive, disrupting wireless connectivity for affected devices.

Vendors: Qualcomm.

Quick answers

Is CVE-2026-25275 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-25275 being exploited in the wild.
How severe is CVE-2026-25275?: High severity, with a CVSS score of 7.5, published 17 September 2026.
Which products and versions are affected?: Qualcomm WiFi Chipset Firmware <UNKNOWN>.
Is there a fix for CVE-2026-25275?: 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-2026-25275 attacked?: It is attacked from the adjacent network, in device firmware.
Am I affected by CVE-2026-25275?: Check whether you run Qualcomm WiFi Chipset Firmware 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

The vulnerability exists in the FILS information element parser within Qualcomm WiFi chipset firmware, which fails to properly validate the header length fields in authentication frames. When an attacker sends an authentication frame with an invalid FILS IE header length, the parser enters an error state causing a transient denial of service. The attack requires network-adjacent proximity (ability to transmit WiFi frames) but no prior authentication. The impact is temporary unresponsiveness of the WiFi chipset, requiring a reset or reconnection to restore service. Qualcomm has released firmware patches addressing this validation issue.

Affected products

Qualcomm WiFi Chipset Firmware <UNKNOWN>

Timeline

2026-09-17: disclosed

References

https://docs.qualcomm.com/product/publicresources/securitybulletin/september-2026-bulletin.html

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