CVE-2026-21381: Buffer Over-read in WLAN Firmware

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-06 · updated 2026-10-26
Weakness: CWE-126

Description

Transient DOS when receiving a service data frame with excessive length during device matching over a neighborhood awareness network protocol connection.

Affected products

Qualcomm Ar8035 Firmware: all versions
Qualcomm Cologne Firmware: all versions
Qualcomm Fastconnect 6200 Firmware: all versions
Qualcomm Fastconnect 6700 Firmware: all versions
Qualcomm Fastconnect 6900 Firmware: all versions
Qualcomm Fastconnect 7800 Firmware: all versions
Qualcomm Fwa Gen 3 Ultra Firmware: all versions
Qualcomm G2 Gen 1 Firmware: all versions
Qualcomm Milos Firmware: all versions
Qualcomm Netrani Firmware: all versions
Qualcomm Orne Firmware: all versions
Qualcomm Palawan25 Firmware: all versions
Qualcomm Pandeiro Firmware: all versions
Qualcomm Qca6391 Firmware: all versions
Qualcomm Qca6698Au Firmware: all versions
Qualcomm Qca6777Aq Firmware: all versions
Qualcomm Qca6787Aq Firmware: all versions
Qualcomm Qca6797Aq Firmware: all versions
Qualcomm Qca8081 Firmware: all versions
Qualcomm Qca8337 Firmware: all versions
Qualcomm Qcc2073 Firmware: all versions
Qualcomm Qcc2076 Firmware: all versions
Qualcomm Qcc710 Firmware: all versions
Qualcomm Qcn6224 Firmware: all versions
Qualcomm Qcn6274 Firmware: all versions
Qualcomm Qcn9011 Firmware: all versions
Qualcomm Qcn9012 Firmware: all versions
Qualcomm Qcs8550 Firmware: all versions
Qualcomm Qfw7114 Firmware: all versions
Qualcomm Qfw7124 Firmware: all versions

References

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

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