CVE-2025-21476: qualcomm, inc. snapdragon Classic Buffer Overflow
CVSS: 7.8v3.1HighAnalyzed
Published 24-09-2025Last modified 26-02-2026
Vulnerability summary
CVE-2025-21476 is a high (CVSS 7.8) Classic Buffer Overflow vulnerability in qualcomm, inc. snapdragon. EPSS estimates a 0.09% chance of exploitation in the next 30 days, higher than 0.3% of scored vulnerabilities.
CVSS score
7.8/10
010
High · v3.1 (CVE.org)EPSS score
0.09%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 24-09-2025PublishedVulnerability first disclosed.
- 26-02-2026Last modifiedVulnerability information updated.
Description
Memory corruption when passing parameters to the Trusted Virtual Machine during the handshake.
CVSS metrics
2 scores · 2 sources · 1 versionHigh 7.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HSourcesAll 2 agree
- NVDNIST7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.09%
Chance of exploitation in the next 30 days
Percentile
0%
Versus all other CVEs
30-day change
0.00 pp
From 0.09% on 21-09-2026
21-09-202621-10-2026
EPSS score0.09%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Qualcomm42 products
Qualcomm, inc.1 product
- snapdragonQCM5430 | QCM6490 | QCM8550 | QCS5430 | QCS615 | QCS6490 | QCS8550 | QCS9100 | SG8275 | SG8275P | SM6650 | SM7635 | SM7675 | SM7675P | SM8550 | SM8550P | SM8635 | SM8635P | SM8650 | SM8650P | SM8650Q | SM8750 | SM8750P | SXR2330P | QCA6391 | QCA6698AQ | QCN9011 | QCN9012 | QCN9274 | WCN3910 | WCN3950 | WCN6650 | WCN6750 | WCN6755 | WCN6855 | WCN6856 | WCN7850 | WCN7851 | WCN7860 | WCN7861 | WCN7880 | WCN7881
2 vendors · 43 products