CVE-2026-70271

HIGHPre-NVD 7.07.0
EchelonGraph scoreHIGH confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 7.0 from GitHub Security Advisory (severity: HIGH) published 2026-10-13. A secondary CVSS source baseline 7.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-99205 (ENISA EUVD) · GHSA-3hrg-mq8h-whwj (GitHub Security Advisories)Source: ENISA EUVD

7.0EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.

CVSS v3
7.0
EG Score
7.0HIGHhigh confidence
EG Risk
32
EG Risk 32/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity70% × 45%
Impact severity (EG Severity): CVSS 7.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
26th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.0): severity, escalated by confirmed exploitation. This CVE's 7.0 is its impact severity (EG Severity), not escalated.

EG Severity
7.0 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

October 13, 2026

Last Modified

October 31, 2026

Advisory Details (1)

Auto-updated Oct 14, 2026
Patch available. Sources: microsoft.
Microsoft

Security Update Guide - Microsoft Security Response Center

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70271

Vendor Advisories for CVE-2026-70271(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 29× in last 7d / 98× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  2. 2026-10-31 18:27 UTCEG score recompute
  3. 2026-10-31 18:27 UTCVendor advisory
  4. 2026-10-31 18:27 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  5. 2026-10-31 18:12 UTCEG score recompute
  6. 2026-10-31 18:12 UTCVendor advisory
  7. 2026-10-31 18:12 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  8. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  9. 2026-10-31 16:20 UTCVendor advisory
  10. 2026-10-31 16:20 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  11. 2026-10-30 19:16 UTCEG score recompute
  12. 2026-10-30 19:16 UTCVendor advisory
  13. 2026-10-30 19:16 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  14. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  15. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  16. 2026-10-29 15:18 UTCVendor advisory
  17. 2026-10-29 15:18 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  18. 2026-10-28 18:36 UTCEG score recompute
  19. 2026-10-28 18:35 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  20. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  21. 2026-10-27 21:35 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  22. 2026-10-27 20:46 UTCEG score recompute
  23. 2026-10-27 20:46 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  24. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  25. 2026-10-26 20:43 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
Show 73 more
  1. 2026-10-26 19:23 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  2. 2026-10-26 18:03 UTCEG score recompute
  3. 2026-10-26 18:02 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  4. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  5. 2026-10-25 18:55 UTCVendor advisory
  6. 2026-10-25 18:54 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  7. 2026-10-25 17:14 UTCEG score recompute
  8. 2026-10-25 17:14 UTCVendor advisory
  9. 2026-10-25 17:14 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  10. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  11. 2026-10-25 14:08 UTCEG score recompute
  12. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  13. 2026-10-23 22:38 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  14. 2026-10-23 17:58 UTCEG score recompute
  15. 2026-10-23 17:58 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  16. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  17. 2026-10-22 22:24 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  18. 2026-10-22 21:55 UTCEG score recompute
  19. 2026-10-22 21:55 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  20. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  21. 2026-10-22 16:01 UTCEG score recompute
  22. 2026-10-22 16:01 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  23. 2026-10-22 12:46 UTCEG score recompute
  24. 2026-10-22 12:46 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  25. 2026-10-21 20:59 UTCVendor advisory
  26. 2026-10-21 20:59 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  27. 2026-10-21 16:54 UTCEG score recompute
  28. 2026-10-21 16:54 UTCVendor advisory
  29. 2026-10-21 16:54 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  30. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  31. 2026-10-20 22:20 UTCVendor advisory
  32. 2026-10-20 22:19 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  33. 2026-10-20 18:46 UTCEG score recompute
  34. 2026-10-20 18:46 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  35. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  36. 2026-10-19 23:54 UTCVendor advisory
  37. 2026-10-19 23:54 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  38. 2026-10-19 19:45 UTCEG score recompute
  39. 2026-10-19 19:45 UTCVendor advisory
  40. 2026-10-19 19:44 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  41. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  42. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  43. 2026-10-18 03:18 UTCEG score recompute
  44. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  45. 2026-10-16 23:27 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  46. 2026-10-16 21:25 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  47. 2026-10-16 20:40 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  48. 2026-10-16 17:41 UTCEG score recompute
  49. 2026-10-16 17:40 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  50. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  51. 2026-10-16 16:16 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  52. 2026-10-16 13:25 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  53. 2026-10-15 22:41 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  54. 2026-10-15 21:59 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  55. 2026-10-15 21:08 UTCEG score recompute
  56. 2026-10-15 21:07 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  57. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  58. 2026-10-14 17:59 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  59. 2026-10-14 17:08 UTCEG score recompute
  60. 2026-10-14 17:08 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  61. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  62. 2026-10-14 04:32 UTCEG score recompute
  63. 2026-10-14 04:31 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  64. 2026-10-14 04:11 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  65. 2026-10-13 22:23 UTCEG score recompute
  66. 2026-10-13 22:23 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  67. 2026-10-13 21:43 UTCEG score recompute
  68. 2026-10-13 21:42 UTCGHSA enrichmentGHSA-3hrg-mq8h-whwj · GitHub severity HIGH · GitHub CVSS 7.0
  69. 2026-10-13 21:05 UTCEG score recompute
  70. 2026-10-13 20:47 UTCEG score recompute
  71. 2026-10-13 19:47 UTCEG score recomputeFirst assessed: 7.0 HIGH
  72. 2026-10-13 19:47 UTCVendor advisory
  73. 2026-10-13 19:19 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-70271?
CVE-2026-70271 is a high-severity vulnerability; its CVE record was published on October 13, 2026. Use after free in Windows Win32 Kernel Subsystem allows an authorized attacker to elevate privileges locally.
When was CVE-2026-70271 made public?
CVE-2026-70271 was made public on October 13, 2026: that is the date its CVE record's CNA, Microsoft Corporation, gives for when the vulnerability was made public. The CVE record itself was published on October 13, 2026. EchelonGraph's copy of the record carries a last-modified date of October 31, 2026; the record at its source may have been updated since.
Is CVE-2026-70271 actively exploited?
CVE-2026-70271 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (26th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-70271?
CVE-2026-70271 has a CVSS base score of 7.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-70271?
A fix for CVE-2026-70271 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-70271 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-70271

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