CVE-2021-25372: in the CISA KEV catalogue
Samsung Mobile Devices Improper Boundary Check Vulnerability. CISA added CVE-2021-25372 to the Known Exploited Vulnerabilities catalogue on 2023-06-29 with a default due date of 2023-07-20. Known ransomware campaign use: Unknown. Forensic triage flag: No.
Samsung mobile devices contain an improper boundary check vulnerability within DSP driver that allows for out-of-bounds memory access. (CISA description)
- Vendor / product
- Samsung Mobile Devices
- CWE
- CWE-787
- CISA required action
- Apply updates per vendor instructions or discontinue use of the product if updates are unavailable
- EPSS
- 0.80%, percentile 56 (scored 2026-11-03)
EPSS puts about 8.0 in 1,000 odds (0.80%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 56% of scored CVEs. Most CVEs score under 1%, so a high percentile can sit on a small probability: read the percentage first.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2021-25372 in the CISA KEV catalogue?
Yes. CISA added CVE-2021-25372 (Samsung Mobile Devices Improper Boundary Check Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2023-06-29. CISA's default due date for it is 2023-07-20.
Is CVE-2021-25372 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2021-25372. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2021-25372?
CISA's required action: Apply updates per vendor instructions or discontinue use of the product if updates are unavailable
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2021-25372