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
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 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)
EG Risk
35(Track)
EG Risk 35/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
1%
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 11× in last 7d / 56× 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 129 total refreshes for this CVE.

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

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% probability of exploitation in the next 30 days, which ranks it in the top 99.3% of all scored CVEs.
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