Security readout for executives and security teams
Plain-English summary
CVE-2026-20976 affects Samsung Galaxy Store. Samsung describes improper input validation that can let a local attacker execute arbitrary script on devices running Galaxy Store before version 4.6.02. The issue is rated medium, not currently listed in CISA KEV, and requires local attack conditions, lowering broad internet risk.
Executive priority
Treat as a routine mobile fleet update with moderate urgency. It is not currently evidenced as actively exploited, but local script execution in a preinstalled app store component warrants timely remediation, especially on managed Samsung devices handling sensitive business data.
Technical view
The CVE is CWE-20 improper input validation in Galaxy Store. CVSS v4.0 is 5.1: local attack vector, low complexity, no privileges, no user interaction, and low confidentiality impact only. Samsung’s description states versions prior to 4.6.02 are affected and arbitrary script execution is possible locally.
Likely exposure
Exposure is most likely on Samsung Android devices with Galaxy Store installed and not updated to the Samsung-described fixed/current version. This is not described as a network-reachable server vulnerability. Enterprise risk depends on managed device inventory, app update controls, and whether vulnerable Galaxy Store versions remain deployed.
Exploitation context
Sources only support local exploitation. There is no provided evidence of active exploitation, public exploit use, or KEV listing. The impact described is arbitrary script execution with limited CVSS impact signals, primarily confidentiality. Attack preconditions beyond local access are not detailed in the provided sources.
Researcher notes
The source bundle has a minor ambiguity: the description says prior to 4.6.02, while the affected entry lists 4.6.02. Do not assume more than the advisory states. Validate against Samsung’s January 2026 page and CVE record before final asset impact decisions.
Mitigation direction
- Update Galaxy Store according to Samsung’s January 2026 security guidance.
- Prioritize managed Samsung devices with outdated Galaxy Store versions.
- Use mobile device management to verify app update compliance.
- If update details are unclear, check Samsung’s advisory and support channels.
Validation and detection
- Inventory Samsung devices with Galaxy Store installed.
- Check Galaxy Store version against Samsung’s advisory language for 4.6.02.
- Confirm devices receive Galaxy Store updates successfully.
- Review MDM compliance reports for outdated app versions.
- Monitor Samsung’s advisory for clarifications or revised affected-version data.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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Open ATT&CK lookupCVE-2026-20976 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.1 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
5.1MediumVector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source materials
- CVE List V5 sourceCVE List V5
- https://security.samsungmobile.com/serviceWeb.smsb?year=2026&month=01CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.