CVE-2026-21031

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory published 2026-06-05. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Improper authorization in AppBlock prior to SMR Jun-2026 Release 1 allows local attacker to launch arbitrary activity. User interaction is required for triggering this vulnerability.

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
0.7%
KEV
Not listed

Published

June 5, 2026

Last Modified

June 6, 2026

Advisory Details (1)

Auto-updated Jun 6, 2026
No patch confirmed yet.
generic

Samsung Mobile Security

https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=06

Vendor Advisories for CVE-2026-21031(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 27× in last 7d / 134× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 143 total refreshes for this CVE.

  1. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-05 18:46 UTCEG score recompute
  4. 2026-07-05 18:46 UTCGHSA enrichment
  5. 2026-07-04 20:49 UTCEG score recompute
  6. 2026-07-04 20:49 UTCGHSA enrichment
  7. 2026-07-04 06:31 UTCEPSS rescore
  8. 2026-07-04 06:31 UTCEPSS rescore
  9. 2026-07-03 21:21 UTCEG score recompute
  10. 2026-07-03 21:21 UTCGHSA enrichment
  11. 2026-07-03 09:51 UTCEG score recompute
  12. 2026-07-03 09:51 UTCGHSA enrichment
  13. 2026-07-02 16:58 UTCEG score recompute
  14. 2026-07-02 16:58 UTCGHSA enrichment
  15. 2026-07-02 05:44 UTCEG score recompute
  16. 2026-07-02 05:44 UTCGHSA enrichment
  17. 2026-07-01 18:33 UTCEG score recompute
  18. 2026-07-01 18:33 UTCGHSA enrichment
  19. 2026-07-01 15:06 UTCEPSS rescore
  20. 2026-07-01 15:06 UTCEPSS rescore
  21. 2026-07-01 07:20 UTCEG score recompute
  22. 2026-07-01 07:20 UTCGHSA enrichment
  23. 2026-06-30 23:22 UTCEPSS rescore
  24. 2026-06-30 19:08 UTCEG score recompute
  25. 2026-06-30 19:08 UTCGHSA enrichment
Show 75 more
  1. 2026-06-30 07:51 UTCEG score recompute
  2. 2026-06-30 07:51 UTCGHSA enrichment
  3. 2026-06-29 20:08 UTCEG score recompute
  4. 2026-06-29 20:08 UTCGHSA enrichment
  5. 2026-06-29 08:58 UTCEG score recompute
  6. 2026-06-29 08:58 UTCGHSA enrichment
  7. 2026-06-28 21:47 UTCEG score recompute
  8. 2026-06-28 21:47 UTCGHSA enrichment
  9. 2026-06-28 14:07 UTCEPSS rescore
  10. 2026-06-28 10:36 UTCEG score recompute
  11. 2026-06-28 10:36 UTCGHSA enrichment
  12. 2026-06-28 04:56 UTCEPSS rescore
  13. 2026-06-28 04:56 UTCEPSS rescore
  14. 2026-06-27 23:27 UTCEG score recompute
  15. 2026-06-27 23:27 UTCGHSA enrichment
  16. 2026-06-27 12:17 UTCEG score recompute
  17. 2026-06-27 12:17 UTCGHSA enrichment
  18. 2026-06-27 03:08 UTCEPSS rescore
  19. 2026-06-27 01:06 UTCEG score recompute
  20. 2026-06-27 01:06 UTCGHSA enrichment
  21. 2026-06-26 13:08 UTCEG score recompute
  22. 2026-06-26 13:07 UTCGHSA enrichment
  23. 2026-06-25 20:06 UTCEG score recompute
  24. 2026-06-25 20:06 UTCGHSA enrichment
  25. 2026-06-25 08:49 UTCEG score recompute
  26. 2026-06-25 08:49 UTCGHSA enrichment
  27. 2026-06-24 21:39 UTCEG score recompute
  28. 2026-06-24 21:39 UTCGHSA enrichment
  29. 2026-06-24 14:05 UTCEPSS rescore
  30. 2026-06-24 08:30 UTCEG score recompute
  31. 2026-06-24 08:30 UTCGHSA enrichment
  32. 2026-06-23 21:32 UTCEPSS rescore
  33. 2026-06-23 17:50 UTCEG score recompute
  34. 2026-06-23 17:50 UTCGHSA enrichment
  35. 2026-06-22 23:00 UTCEG score recompute
  36. 2026-06-22 23:00 UTCGHSA enrichment
  37. 2026-06-21 05:25 UTCEG score recompute
  38. 2026-06-21 05:25 UTCGHSA enrichment
  39. 2026-06-21 01:59 UTCEPSS rescore
  40. 2026-06-21 01:59 UTCEPSS rescore
  41. 2026-06-20 08:41 UTCEG score recompute
  42. 2026-06-20 08:41 UTCGHSA enrichment
  43. 2026-06-19 14:09 UTCEG score recompute
  44. 2026-06-19 14:09 UTCGHSA enrichment
  45. 2026-06-19 02:23 UTCEG score recompute
  46. 2026-06-19 02:23 UTCGHSA enrichment
  47. 2026-06-18 17:52 UTCEPSS rescore
  48. 2026-06-18 14:13 UTCEG score recompute
  49. 2026-06-18 14:12 UTCGHSA enrichment
  50. 2026-06-18 02:35 UTCEG score recompute
  51. 2026-06-18 02:34 UTCGHSA enrichment
  52. 2026-06-17 17:53 UTCEPSS rescore
  53. 2026-06-17 15:25 UTCEG score recompute
  54. 2026-06-17 15:25 UTCGHSA enrichment
  55. 2026-06-17 04:15 UTCEG score recompute
  56. 2026-06-17 04:15 UTCGHSA enrichment
  57. 2026-06-16 17:04 UTCEG score recompute
  58. 2026-06-16 17:04 UTCGHSA enrichment
  59. 2026-06-16 05:48 UTCEG score recompute
  60. 2026-06-16 05:48 UTCGHSA enrichment
  61. 2026-06-15 18:38 UTCEG score recompute
  62. 2026-06-15 18:38 UTCGHSA enrichment
  63. 2026-06-15 17:48 UTCEPSS rescore
  64. 2026-06-15 06:14 UTCEG score recompute
  65. 2026-06-15 06:14 UTCGHSA enrichment
  66. 2026-06-14 23:18 UTCEPSS rescore
  67. 2026-06-14 19:02 UTCEG score recompute
  68. 2026-06-14 19:02 UTCGHSA enrichment
  69. 2026-06-14 07:52 UTCEG score recompute
  70. 2026-06-14 07:52 UTCGHSA enrichment
  71. 2026-06-13 23:00 UTCEPSS rescore
  72. 2026-06-13 23:00 UTCEPSS rescore
  73. 2026-06-13 20:42 UTCEG score recompute
  74. 2026-06-13 20:42 UTCGHSA enrichment
  75. 2026-06-13 09:32 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-21031?
CVE-2026-21031 is a high vulnerability published on June 5, 2026. Improper authorization in AppBlock prior to SMR Jun-2026 Release 1 allows local attacker to launch arbitrary activity. User interaction is required for triggering this vulnerability.
When was CVE-2026-21031 disclosed?
CVE-2026-21031 was first published in the National Vulnerability Database on June 5, 2026, with the most recent update on June 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-21031 actively exploited?
CVE-2026-21031 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-21031?
CVE-2026-21031 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-21031?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-21031, 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

Explore the affected products and dependency analysis for CVE-2026-21031

Explore →

Is Your Infrastructure Affected by CVE-2026-21031?

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

Start Free Scan →Browse All CVEs