CVE-2026-21073 — Improper input validation in Galaxy Themes prior to SMR Aug-2026 Release 1 allows…

Triage

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

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.

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, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Attack characteristics

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

Every base score collected

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

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.

Timeline

What happened to this CVE, newest first.

• 2026
• Affected products added · samsung mobile/samsung mobile devices
  Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
• SSVC assessment updated
  Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
• Record published
  Oct 15, 2026
• CVSS changed · 6.1
  Oct 15, 2026 · NIST National Vulnerability Database
• Source status changed · → Analyzed
  Oct 15, 2026 · NIST National Vulnerability Database
• Record created in this database
  Oct 15, 2026 · NIST National Vulnerability Database
• CVE published
  Aug 10, 2026 · SamsungMobile

Source activity

Repeated readings are counted rather than listed.

• 1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

1 on the record

• security.samsungmobile.com/securityUpdate.smsb
  Vendor Advisory, NIST National Vulnerability Database

Elsewhere on this site

Related CVEs (same products)

• High CVE-2026-21125 Improper input validation in parsing sheifd in libsimba.heifdec.media.samsung.so prior to SMR Oct... 3d
• Medium CVE-2026-21126 Improper input validation in getting cover image in libsimba.heifdec.media.samsung.so prior to... 3d
• Medium CVE-2026-21117 Improper access control in CocktailBarService prior to SMR Oct-2026 Release 1 allows local... 3d
• Medium 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... 3d
• Medium CVE-2026-21123 Improper privilege management in Locksettings prior to SMR Oct-2026 Release 1 allows local... 3d
• Medium CVE-2026-21118 Improper access control in DownloadProvider prior to SMR Oct-2026 Release 1 allows local... 3d

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 FIRST EPSS score.
• No fixed version, patch or mitigation documented.
• No CWE classification.
• 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-2026-21073 is "Improper input validation in Galaxy Themes prior to SMR Aug-2026 Release 1 allows…", 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 6.1 describes technical severity. 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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