CVE-2026-70338

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-11. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 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: 0.4%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Improper control of generation of code ('code injection') in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
27th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 11, 2026

Last Modified

September 29, 2026

Advisory Details (1)

Auto-updated Aug 11, 2026
Patch available. Sources: microsoft.
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70338

Vendor Advisories for CVE-2026-70338(2)

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 32× in last 7d / 153× 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 383 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-70338?
CVE-2026-70338 is a high vulnerability published on August 11, 2026. Improper control of generation of code ('code injection') in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.
When was CVE-2026-70338 disclosed?
CVE-2026-70338 was first published on August 11, 2026, with the most recent update on September 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-70338 actively exploited?
CVE-2026-70338 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (27th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-70338?
CVE-2026-70338 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-70338?
A fix for CVE-2026-70338 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-70338 are linked in the Vendor Advisories panel on this page.

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