CVE-2025-21432

Q: What is the severity of CVE-2025-21432?

CVE-2025-21432 has a CVSS score of 7.8 (HIGH). This vulnerability allows memory corruption when retrieving CBOR data from a Trusted Application (TA) in Qualcomm components. Attackers could potentially execute arbitrary code or cause denial of service. This affects devices using vulnerable Qualcomm chipsets.

7.8 HIGH

📋 TL;DR

This vulnerability allows memory corruption when retrieving CBOR data from a Trusted Application (TA) in Qualcomm components. Attackers could potentially execute arbitrary code or cause denial of service. This affects devices using vulnerable Qualcomm chipsets.

💻 Affected Systems

Products:

Qualcomm chipsets with Trusted Application framework

Versions: Specific versions not detailed in reference; check Qualcomm advisory for affected chipset models

Operating Systems: Android, Linux-based systems using Qualcomm chips

Default Config Vulnerable: ⚠️ Yes

Notes: Affects devices with Qualcomm chipsets that use Trusted Applications for secure processing

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution leading to complete device compromise, data theft, or persistent backdoor installation

🟠

Likely Case

Application crash or denial of service affecting device functionality

🟢

If Mitigated

Limited impact due to sandboxing or privilege separation preventing full system compromise

🌐 Internet-Facing: MEDIUM

🏢 Internal Only: HIGH

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: HIGH

Exploitation requires specific conditions and knowledge of TA implementation details

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Check Qualcomm security bulletin for specific chipset firmware updates

Vendor Advisory: https://docs.qualcomm.com/product/publicresources/securitybulletin/july-2025-bulletin.html

Restart Required: Yes

Instructions:

1. Check Qualcomm advisory for affected chipset models. 2. Contact device manufacturer for firmware updates. 3. Apply firmware updates following manufacturer instructions. 4. Reboot device after update.

🔧 Temporary Workarounds

Disable vulnerable TAs

linux

Identify and disable Trusted Applications that process CBOR data if not essential

Requires manufacturer-specific TA management tools

🧯 If You Can't Patch

Isolate affected devices from untrusted networks
Implement strict access controls and monitoring for TA-related processes

🔍 How to Verify

Check if Vulnerable:

Check device chipset model and firmware version against Qualcomm advisory

Check Version:

Manufacturer-specific commands (e.g., 'getprop ro.bootloader' on Android for some devices)

Verify Fix Applied:

Verify firmware version has been updated to patched version from manufacturer

📡 Detection & Monitoring

Log Indicators:

Unexpected TA crashes
Memory access violations in secure processing logs

Network Indicators:

Unusual TA communication patterns

SIEM Query:

Process monitoring for TA execution anomalies or crash reports

📊 Metadata

CVE ID: CVE-2025-21432

CVSS v3 Score: 7.8 (HIGH)

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

CWE: CWE-415

EPSS Score: 0.02% exploit probability (4.1th percentile)

Published: July 8, 2025

Last Updated: August 11, 2025

🔗 References

https://docs.qualcomm.com/product/publicresources/securitybulletin/july-2025-bulletin.html Vendor Advisory

📋 TL;DR

💻 Affected Systems

📦 What is this software?

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Ar8035 Firmware by Qualcomm

Csra6620 Firmware by Qualcomm

Csra6640 Firmware by Qualcomm

Fastconnect 6200 Firmware by Qualcomm

Fastconnect 6700 Firmware by Qualcomm

Fastconnect 6800 Firmware by Qualcomm

Fastconnect 6900 Firmware by Qualcomm

Fastconnect 7800 Firmware by Qualcomm

Flight Rb5 5g Firmware by Qualcomm

Qam8255p Firmware by Qualcomm

Qam8295p Firmware by Qualcomm

Qam8620p Firmware by Qualcomm

Qam8650p Firmware by Qualcomm

Qam8775p Firmware by Qualcomm

Qamsrv1h Firmware by Qualcomm

Qamsrv1m Firmware by Qualcomm

Qca6174a Firmware by Qualcomm

Qca6391 Firmware by Qualcomm

Qca6420 Firmware by Qualcomm

Qca6421 Firmware by Qualcomm

Qca6426 Firmware by Qualcomm

Qca6430 Firmware by Qualcomm

Qca6431 Firmware by Qualcomm

Qca6436 Firmware by Qualcomm

Qca6574 Firmware by Qualcomm

Qca6574a Firmware by Qualcomm

Qca6574au Firmware by Qualcomm

Qca6584au Firmware by Qualcomm

Qca6595 Firmware by Qualcomm

Qca6595au Firmware by Qualcomm

Qca6678aq Firmware by Qualcomm

Qca6688aq Firmware by Qualcomm

Qca6696 Firmware by Qualcomm

Qca6698aq Firmware by Qualcomm

Qca6698au Firmware by Qualcomm

Qca6797aq Firmware by Qualcomm

Qca8081 Firmware by Qualcomm

Qca8337 Firmware by Qualcomm

Qcc710 Firmware by Qualcomm

Qcm2290 Firmware by Qualcomm

Qcm4290 Firmware by Qualcomm

Qcm4325 Firmware by Qualcomm

Qcm4490 Firmware by Qualcomm

Qcm5430 Firmware by Qualcomm

Qcm6125 Firmware by Qualcomm

Qcm6490 Firmware by Qualcomm

Qcm8550 Firmware by Qualcomm

Qcn6024 Firmware by Qualcomm

Qcn6224 Firmware by Qualcomm

Qcn6274 Firmware by Qualcomm

Qcn7606 Firmware by Qualcomm

Qcn9011 Firmware by Qualcomm

Qcn9012 Firmware by Qualcomm

Qcn9024 Firmware by Qualcomm

Qcn9274 Firmware by Qualcomm

Qcs2290 Firmware by Qualcomm

Qcs4290 Firmware by Qualcomm

Qcs4490 Firmware by Qualcomm

Qcs5430 Firmware by Qualcomm

Qcs6125 Firmware by Qualcomm

Qcs615 Firmware by Qualcomm

Qcs6490 Firmware by Qualcomm

Qcs7230 Firmware by Qualcomm

Qcs8250 Firmware by Qualcomm

Qcs8300 Firmware by Qualcomm

Qcs8550 Firmware by Qualcomm

Qcs9100 Firmware by Qualcomm

Qdu1000 Firmware by Qualcomm

Qdu1010 Firmware by Qualcomm

Qdu1110 Firmware by Qualcomm

Qdu1210 Firmware by Qualcomm

Qdx1010 Firmware by Qualcomm

Qdx1011 Firmware by Qualcomm

Qep8111 Firmware by Qualcomm

Qfw7114 Firmware by Qualcomm

Qfw7124 Firmware by Qualcomm