CVE-2025-21477 — HIGH (7.5)

Vulnerability Description

Transient DOS while processing CCCH data when NW sends data with invalid length.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Qualcomm	315 5G Iot Modem Firmware	-
Qualcomm	315 5G Iot Modem	-
Qualcomm	Ar8035 Firmware	-
Qualcomm	Ar8035	-
Qualcomm	Fastconnect 6200 Firmware	-
Qualcomm	Fastconnect 6200	-
Qualcomm	Fastconnect 6700 Firmware	-
Qualcomm	Fastconnect 6700	-
Qualcomm	Fastconnect 6800 Firmware	-
Qualcomm	Fastconnect 6800	-
Qualcomm	Fastconnect 6900 Firmware	-
Qualcomm	Fastconnect 6900	-
Qualcomm	Fastconnect 7800 Firmware	-
Qualcomm	Fastconnect 7800	-
Qualcomm	Qca6391 Firmware	-
Qualcomm	Qca6391	-
Qualcomm	Qca6574A Firmware	-
Qualcomm	Qca6574A	-
Qualcomm	Qca6584Au Firmware	-
Qualcomm	Qca6584Au	-

Related Weaknesses (CWE)

CWE-20

References

https://docs.qualcomm.com/product/publicresources/securitybulletin/august-2025-bVendor Advisory

FAQ

What is CVE-2025-21477?

CVE-2025-21477 is a vulnerability with a CVSS score of 7.5 (HIGH). Transient DOS while processing CCCH data when NW sends data with invalid length.

How severe is CVE-2025-21477?

CVE-2025-21477 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-21477?

Check the references section above for vendor advisories and patch information. Affected products include: Qualcomm 315 5G Iot Modem Firmware, Qualcomm 315 5G Iot Modem, Qualcomm Ar8035 Firmware, Qualcomm Ar8035, Qualcomm Fastconnect 6200 Firmware.