How severe is CVE-2025-21476?

CVE-2025-21476 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-21476 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-21476?

CVE-2025-21476 primarily affects Qualcomm Qcs6490 Firmware. In total, 42 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-21476?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-21476 have an EU (EUVD) identifier?

Yes. CVE-2025-21476 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31004.

When was CVE-2025-21476 published?

CVE-2025-21476 was published on 2025-09-24 and last updated on 2026-06-17.

CVE-2025-21476

CVE-2025-21476 is a high-severity vulnerability in Qualcomm Qcs6490 Firmware with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-31004
Weakness: CWE-120
Affected product: Qualcomm Qcs6490 Firmware
Published: 2025-09-24
Last modified: 2026-06-17

Description

Memory corruption when passing parameters to the Trusted Virtual Machine during the handshake.

Frequently asked questions

What is CVE-2025-21476?: Memory corruption when passing parameters to the Trusted Virtual Machine during the handshake.
How severe is CVE-2025-21476?: CVE-2025-21476 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-21476 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-21476?: CVE-2025-21476 primarily affects Qualcomm Qcs6490 Firmware. In total, 42 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-21476?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-21476 have an EU (EUVD) identifier?: Yes. CVE-2025-21476 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31004.
When was CVE-2025-21476 published?: CVE-2025-21476 was published on 2025-09-24 and last updated on 2026-06-17.

References

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

Affected products (42)

cpe:2.3:o:qualcomm:qcs6490_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:qcs8550_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:qcs9100_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sg8275_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sg8275p_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sm6650_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sm7635_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sm7675_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sm7675p_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sm8550_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sm8550p_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sm8635_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sm8635p_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sm8650_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sm8650p_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sm8650q_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sm8750_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sm8750p_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:sxr2330p_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:qca6391_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:qca6698aq_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:qcn9011_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:qcn9012_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:qcn9274_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:wcn3910_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:wcn3950_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:wcn6650_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:wcn6750_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:wcn6755_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:wcn6855_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:wcn6856_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:wcn7850_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:wcn7851_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:wcn7860_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:wcn7861_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:wcn7880_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:wcn7881_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:qcm5430_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:qcm6490_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qualcomm:qcm8550_firmware:-:*:*:*:*:*:*:*

More vulnerabilities in Qualcomm Qcs6490 Firmware

CVE-2025-27034 — Critical (CVSS 9.8): Memory corruption while selecting the PLMN from SOR failed list.
CVE-2025-21483 — Critical (CVSS 9.8): Memory corruption when the UE receives an RTP packet from the network, during the reassembly of NALUs.
CVE-2024-45569 — Critical (CVSS 9.8): Memory corruption while parsing the ML IE due to invalid frame content.
CVE-2023-22388 — Critical (CVSS 9.8): Memory Corruption in Multi-mode Call Processor while processing bit mask API.
CVE-2023-33028 — Critical (CVSS 9.8): Memory corruption in WLAN Firmware while doing a memory copy of pmk cache.
CVE-2023-24855 — Critical (CVSS 9.8): Memory corruption in Modem while processing security related configuration before AS Security Exchange.

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