CVE-2023-43688

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-09. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

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

An issue was discovered in Malwarebytes 4.x and 5.x (and Nebula 2020-10-21 and later). There is a Heap buffer overflow in various buffer encryption utilities.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
12.2%
KEV
Not listed

Published

June 9, 2026

Last Modified

July 23, 2026

Advisory Details (1)

Auto-updated Jun 9, 2026
No patch confirmed yet.
generic

CVE-2023-43688 - Malwarebytes, Nebula - Buffer overflows

https://www.malwarebytes.com/secure/cves/cve-2023-43688

Vendor Advisories for CVE-2023-43688(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 12× in last 7d / 82× 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 133 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2023-43688?
CVE-2023-43688 is a high vulnerability published on June 9, 2026. An issue was discovered in Malwarebytes 4.x and 5.x (and Nebula 2020-10-21 and later). There is a Heap buffer overflow in various buffer encryption utilities.
When was CVE-2023-43688 disclosed?
CVE-2023-43688 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-43688 actively exploited?
CVE-2023-43688 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 12.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-43688?
CVE-2023-43688 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2023-43688?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-43688, 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

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