CVE Intelligence
Medium Info disclosure

CVE-2023-21435 — Exposure of Sensitive Information vulnerability in Fingerprint TA prior to SMR Feb-2023 Release 1...

Exposure of Sensitive Information vulnerability in Fingerprint TA prior to SMR Feb-2023 Release 1 allows attackers to access the memory address information via log.

Published Feb 9, 2023 · Updated Oct 28, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: Samsung Mobile

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 0.2% (30-day exploitation probability)+1
  • Technical severity (medium)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
0.18%
ahead of 8% of scored CVEs · Oct 28, 2026
Affects
Samsung
Android and 1 more
CVSS base
5.5
Medium · 4 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation
None
none · proof-of-concept · active
Automatable
No
can an attacker script the kill-chain steps
Technical impact
Partial
partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Samsung Android, Samsung Mobile Samsung Mobile Devices).
  2. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
  3. Search available logs for exploit probes matching the vulnerability class (info disclosure), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Samsung Android version 12.0-smr-jul-2023-r1version 12.0-smr-nov-2023-r1version 12.0-smr-nov-2022-r1version 12.0-smr-nov-2021-r1version 12.0-smr-may-2023-r1version 12.0-smr-may-2022-r1version 12.0-smr-mar-2023-r1version 12.0-smr-mar-2022-r1
and 70 more version 12.0-smr-jun-2023-r1version 12.0-smr-jun-2022-r1version 12.0-smr-oct-2022-r1version 12.0-smr-jul-2022-r1version 12.0-smr-jan-2022-r1version 12.0-smr-feb-2023-r1version 12.0-smr-feb-2022-r1version 12.0-smr-dec-2023-r1version 12.0-smr-dec-2022-r1version 12.0-smr-dec-2021-r1version 12.0-smr-aug-2023-r1version 12.0-smr-aug-2022-r1version 13.0-smr-feb-2023-r1version 13.0-smr-sep-2023-r1version 13.0-smr-oct-2023-r1version 13.0-smr-oct-2022-r1version 13.0-smr-nov-2023-r1version 13.0-smr-nov-2022-r1version 13.0-smr-may-2023-r1version 13.0-smr-mar-2023-r1version 13.0-smr-jun-2023-r1version 13.0-smr-jul-2023-r1version 11.0-smr-apr-2021-r1version 13.0-smr-dec-2023-r1version 13.0-smr-dec-2022-r1version 13.0-smr-aug-2023-r1version 13.0-smr-apr-2023-r1version 13.0version 12.0-smr-sep-2023-r1version 12.0-smr-sep-2022-r1version 12.0-smr-oct-2023-r1version 11.0-smr-dec-2023-r1version 11.0-smr-jun-2021-r1version 11.0-smr-jul-2023-r1version 11.0-smr-jul-2022-r1version 11.0-smr-jul-2021-r1version 11.0-smr-jan-2022-r1version 11.0-smr-jan-2021-r1version 11.0-smr-feb-2023-r1version 11.0-smr-feb-2022-r1version 11.0-smr-feb-2021-r1version 12.0-smr-apr-2022-r1version 11.0-smr-dec-2022-r1version 11.0-smr-dec-2021-r1version 11.0-smr-dec-2020-r1version 11.0-smr-aug-2023-r1version 11.0-smr-aug-2022-r1version 11.0-smr-aug-2021-r1version 11.0-smr-apr-2023-r1version 11.0-smr-apr-2022-r1version 11.0version 11.0-smr-jun-2023-r1version 12.0-smr-apr-2023-r1version 12.0version 11.0-smr-sep-2023-r1version 11.0-smr-sep-2022-r1version 11.0-smr-sep-2021-r1version 11.0-smr-oct-2023-r1version 11.0-smr-oct-2022-r1version 11.0-smr-oct-2021-r1version 11.0-smr-nov-2023-r1version 11.0-smr-nov-2022-r1version 11.0-smr-nov-2021-r1version 11.0-smr-may-2023-r1version 11.0-smr-may-2022-r1version 11.0-smr-may-2021-r1version 11.0-smr-mar-2023-r1version 11.0-smr-mar-2022-r1version 11.0-smr-mar-2021-r1version 11.0-smr-jun-2022-r1
Vulnerable NIST National Vulnerability Database
Samsung Mobile Samsung Mobile Devices ≥ Select R(11), S(12), T(13) devices and < SMR Feb-2023 Release 1 Vulnerable CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
5.5 CVSS 3.1 Medium 1.8 3.6 nvd@nist.gov via NIST National Vulnerability Database
5.5 CVSS 3.1 Medium — — GitHub, Inc. via GitHub Security Advisories
4.4 CVSS 3.1 Medium 0.8 3.6 mobile.security@samsung.com via NIST National Vulnerability Database
4.4 CVSS 3.1 Medium — — Samsung Mobile via CVE Program (cve.org) e CISA ADP
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N (score shown at the top: nvd@nist.gov)
Scoring entities (NIST, CNA, ADP) score independently; each score is shown with its origin. For prioritization we use 5.5 (NVD (NIST)) as a conservative provisional reference — not a definitive official score.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-532 · Insertion of Sensitive Information into Log File

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
  • Look for anomalous data read/export volumes and access to sensitive records.
endpoint telemetry (EDR)application logsauthentication logs

Timeline

What happened to this CVE, newest first.

  • 2026
  • Affected products added · samsung mobile/samsung mobile devices
    Oct 28, 2026 · CVE Program (cve.org) e CISA ADP
  • SSVC assessment updated
    Oct 28, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 28, 2026
  • CVSS changed · 5.5
    Oct 28, 2026 · NIST National Vulnerability Database
  • Source status changed · → Modified
    Oct 28, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 28, 2026 · NIST National Vulnerability Database
  • 2023
  • CVE published
    Feb 9, 2023 · Samsung Mobile

Source activity

Repeated readings are counted rather than listed.

  • 1× References added · Oct 28, 2026 – Oct 28, 2026
  • 1× Official description updated · Oct 28, 2026 – Oct 28, 2026

References

3 on the record

Elsewhere on this site

Samsung
every CVE for this vendor
Info disclosure
same class
CWE-532
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-21126 Improper input validation in getting cover image in libsimba.heifdec.media.samsung.so prior to... 16d
  • CVE-2026-21125 Improper input validation in parsing sheifd in libsimba.heifdec.media.samsung.so prior to SMR Oct... 16d
  • CVE-2026-21123 Improper privilege management in Locksettings prior to SMR Oct-2026 Release 1 allows local... 16d
  • CVE-2026-21120 Use after free in WSM service prior to SMR Oct-2026 Release 1 allows local attackers to... 16d
  • CVE-2026-21119 Out-of-bounds read and write in lib_sag_ai_sound_sep_v2.00.so prior to SMR Oct-2026 Release 1... 16d
  • CVE-2026-21117 Improper access control in CocktailBarService prior to SMR Oct-2026 Release 1 allows local... 16d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No fixed version, patch or mitigation documented.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2023-21435 is "Exposure of Sensitive Information vulnerability in Fingerprint TA prior to SMR Feb-2023 Release 1...", rated Medium. It affects Android (Samsung); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 5.5 describes technical severity. EPSS 0.18% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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