CVE-2026-21023

MEDIUMNVD 5.55.5—

5.5

Insufficient verification of data authenticity in PackageManagerService prior to SMR Mar-2026 Release 1 allows local attackers to modify the installation restriction of specific application.

CVSS v3: 5.5
EG Score: 5.5(high)
EPSS: 0.1%
KEV: Not listed

Published

April 29, 2026

Last Modified

May 1, 2026

Advisory Details (1)

Auto-updated Apr 29, 2026

No patch confirmed yet.

generic

Samsung Mobile Security

https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=03

Data Freshness Timeline

(refreshed 13× in last 7d / 17× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-22 21:16 UTCepss_batch
2026-05-20 15:12 UTCEG score recompute
2026-05-20 15:12 UTCGHSA enrichment
2026-05-18 21:31 UTCepss_batch

Frequently asked(5)

What is CVE-2026-21023?

CVE-2026-21023 is a medium vulnerability published on April 29, 2026. Insufficient verification of data authenticity in PackageManagerService prior to SMR Mar-2026 Release 1 allows local attackers to modify the installation restriction of specific application.

When was CVE-2026-21023 disclosed?

CVE-2026-21023 was first published in the National Vulnerability Database on April 29, 2026, with the most recent update on May 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-21023 actively exploited?

CVE-2026-21023 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-21023?

CVE-2026-21023 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2026-21023?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-21023, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-21023

Explore →

Is Your Infrastructure Affected by CVE-2026-21023?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2026-21023

📅 Published

🔄 Last Modified

📋 Advisory Details (1)