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01 Record

CVE-2021-25500

A missing input validation in HDCP LDFW prior to SMR Nov-2021 Release 1 allows attackers to overwrite TZASC allowing TEE compromise.

HighPUBLISHEDCNA: Samsung Mobile
CNA base score7.2 CVSS v3.xCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N
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02 Description

A missing input validation in HDCP LDFW prior to SMR Nov-2021 Release 1 allows attackers to overwrite TZASC allowing TEE compromise.

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.10% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 1.0% of scored records. A rank, not a probability.
NVD base score
4.4 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-11-05 02:03Z4 YR AGO
Last updated
2024-08-03 20:03Z2 YR AGO
Reserved
2021-01-19
Assigning CNA
Samsung Mobile
Record state
PUBLISHED
Severity
High (CVSS 7.2)
CNA CVSS vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N
Weaknesses
  • CWE-20Improper Input ValidationClass
  • CWE-787Out-of-bounds WriteBase
Data version
5.1
Document digest
5913ef984a227557c005840f748b16df7b561e406e7dc60c1464c273a6de5e61

05 Affected products

VendorProductVersionsPlatforms
Samsung MobileSamsung Mobile DevicesSelect Q(10.0), R(11.0) devices with Exynos 980, 9820, 9830, 2100 chipset to < SMR Nov-2021 Release 1—

06 References