CVE-2021-38406

CRITICALNVD 7.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-08-25), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 76%CVSS: 7.8Exploit: cisa kev · ssvc active · epss top5pct · epss highExposed: 0

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

Delta Electronic DOPSoft 2 (Version 2.00.07 and prior) lacks proper validation of user-supplied data when parsing specific project files. This could result in multiple out-of-bounds write instances. An attacker could leverage this vulnerability to execute code in the context of the current process.

CVSS v3
7.8
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

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
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
76%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

September 17, 2021

Last Modified

October 30, 2025

Advisory Details (2)

Auto-updated Jun 3, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-38406
cisa Patch Available

Delta Electronics DOPSoft 2 (Update A) | CISA

https://us-cert.cisa.gov/ics/advisories/icsa-21-252-02

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 50× in last 7d / 221× 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 711 total refreshes for this CVE.

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

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Frequently asked(6)

What is CVE-2021-38406?
CVE-2021-38406 is a critical vulnerability published on September 17, 2021. Delta Electronic DOPSoft 2 (Version 2.00.07 and prior) lacks proper validation of user-supplied data when parsing specific project files. This could result in multiple out-of-bounds write instances. An attacker could leverage this vulnerability to execute code in the context of the current process.
When was CVE-2021-38406 disclosed?
CVE-2021-38406 was first published in the National Vulnerability Database on September 17, 2021, with the most recent update on October 30, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-38406 actively exploited?
Yes. CISA added CVE-2021-38406 to the Known Exploited Vulnerabilities catalog on August 25, 2022, affecting Delta Electronics DOPSoft 2. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2021-38406?
CVE-2021-38406 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2021-38406?
CVE-2021-38406 affects Delta Electronics DOPSoft 2. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2021-38406?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-38406, 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.

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