CVE-2025-21421

Home/CVE/Memory corruption while processing escape code in API.

CVE

Memory corruption while processing escape code in API.

HIGH · CVSS 7.8 EPSS 0.0022

Schedule remediation

CVSS base score ≥ 7.0

Sigma rules0 YARA rules0

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Weakness Classification

CWE-126Buffer Over-read

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Affected Products & Versions

qualcomm aqt1000 firmwareall versions
qualcomm fastconnect 6200 firmwareall versions
qualcomm fastconnect 6700 firmwareall versions
qualcomm fastconnect 6800 firmwareall versions
qualcomm fastconnect 6900 firmwareall versions
qualcomm fastconnect 7800 firmwareall versions
qualcomm qca6391 firmwareall versions
qualcomm qca6420 firmwareall versions
Show all 45 affected productsqualcomm qca6430 firmwareall versions
qualcomm qcm5430 firmwareall versions
qualcomm qcm6490 firmwareall versions
qualcomm qcs5430 firmwareall versions
qualcomm qcs6490 firmwareall versions
qualcomm video collaboration vc3 platform firmwareall versions
qualcomm sc8180x\+sdx55 firmwareall versions
qualcomm sc8380xp firmwareall versions
qualcomm sm6250 firmwareall versions
qualcomm snapdragon 7c compute platform \(sc7180-ac\) firmwareall versions
qualcomm snapdragon 7c gen 2 compute platform \(sc7180-ad\) \"rennell pro\" firmwareall versions
qualcomm snapdragon 7c\+ gen 3 compute firmwareall versions
qualcomm snapdragon 8c compute platform \(sc8180x-ad\) firmwareall versions
qualcomm snapdragon 8c compute platform \(sc8180xp-ad\) firmwareall versions
qualcomm snapdragon 8cx compute platform \(sc8180x-aa\) firmwareall versions
qualcomm snapdragon 8cx compute platform \(sc8180x-ab\) firmwareall versions
qualcomm snapdragon 8cx compute platform \(sc8180xp-ac\) firmwareall versions
qualcomm snapdragon 8cx compute platform \(sc8180xp-af\) firmwareall versions
qualcomm snapdragon 8cx gen 2 5g compute platform \(sc8180x-ac\) firmwareall versions
qualcomm snapdragon 8cx gen 2 5g compute platform \(sc8180x-af\) firmwareall versions
qualcomm snapdragon 8cx gen 2 5g compute platform \(sc8180xp-aa\) firmwareall versions
qualcomm snapdragon 8cx gen 2 5g compute platform \(sc8180xp-ab\) firmwareall versions
qualcomm snapdragon 8cx gen 3 compute platform \(sc8280xp-ab\) firmwareall versions
qualcomm snapdragon 8cx gen 3 compute platform \(sc8280xp-bb\) firmwareall versions
qualcomm wcd9340 firmwareall versions
qualcomm wcd9341 firmwareall versions
qualcomm wcd9370 firmwareall versions
qualcomm wcd9375 firmwareall versions
qualcomm wcd9380 firmwareall versions
qualcomm wcd9385 firmwareall versions
qualcomm wsa8810 firmwareall versions
qualcomm wsa8815 firmwareall versions
qualcomm wsa8830 firmwareall versions
qualcomm wsa8835 firmwareall versions
qualcomm wsa8840 firmwareall versions
qualcomm wsa8845 firmwareall versions
qualcomm wsa8845h firmwareall versions

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Scoring & Timeline

7.8

HIGH · CVSS v3.1 · product-security@qualcomm.com

View on NVD

Attack Vector

Network Adjacent Local Physical

Attack Complexity

Low High

Privileges Required

None Low High

User Interaction

None Required

Scope

Unchanged Changed

Confidentiality

None Low High

Integrity

None Low High

Availability

None Low High

Published to NVD07 Apr 2025 · 11:15 AM

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

SSVC triage · cisa-vulnrichment

Exploitation

none

Automatable

Technical impact

total

SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.

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References & Sources

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

https://docs.qualcomm.com/product/publicresources/securitybulletin/april-2025-bulletin.htmlVendor Advisory

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External lookups - second-class, for what we don’t hold ourselves

NVD CVE.org CISA Vulners Exploit-DB GitHub PoC VulnCheck KEV GreyNoise

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NIST 800-53
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CIS Controls v8.1

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