CVE-2025-21487: Buffer Over-read in Data Network Stack & Connectivity

Severity: high (CVSS 8.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-09-24 · updated 2026-09-26
Weakness: CWE-126

Description

Information disclosure while decoding RTP packet received by UE from the network, when payload length mentioned is greater than the available buffer length.

Affected products

Qualcomm 205 Mobile Platform Firmware: all versions
Qualcomm 215 Mobile Platform Firmware: all versions
Qualcomm Apq8017 Firmware: all versions
Qualcomm Apq8064Au Firmware: all versions
Qualcomm Aqt1000 Firmware: all versions
Qualcomm Fastconnect 6200 Firmware: all versions
Qualcomm Fastconnect 6700 Firmware: all versions
Qualcomm Fastconnect 6800 Firmware: all versions
Qualcomm Fastconnect 6900 Firmware: all versions
Qualcomm Fastconnect 7800 Firmware: all versions
Qualcomm Msm8996Au Firmware: all versions
Qualcomm Qam8255P Firmware: all versions
Qualcomm Qam8295P Firmware: all versions
Qualcomm Qam8620P Firmware: all versions
Qualcomm Qam8650P Firmware: all versions
Qualcomm Qam8775P Firmware: all versions
Qualcomm Qamsrv1H Firmware: all versions
Qualcomm Qamsrv1M Firmware: all versions
Qualcomm Qca6310 Firmware: all versions
Qualcomm Qca6320 Firmware: all versions
Qualcomm Qca6335 Firmware: all versions
Qualcomm Qca6391 Firmware: all versions
Qualcomm Qca6420 Firmware: all versions
Qualcomm Qca6426 Firmware: all versions
Qualcomm Qca6430 Firmware: all versions
Qualcomm Qca6436 Firmware: all versions
Qualcomm Qca6564 Firmware: all versions
Qualcomm Qca6564A Firmware: all versions
Qualcomm Qca6564Au Firmware: all versions
Qualcomm Qca6574 Firmware: all versions

References

https://docs.qualcomm.com/product/publicresources/securitybulletin/september-2025-bulletin.html

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