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CVE-2026-83634

Windows BitLocker Elevation of Privilege Vulnerability

High7.8EPSS 0.35%
Published
Updated
Reserved
Assigned by
microsoft

Description

Double free in Windows BitLocker allows an authorized attacker to elevate privileges locally.

Timeline

  1. ID reserved

    By microsoft

  2. · 43 days later

    Published

  3. · 18 days later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-83634, by who scored it
Scored byCVSSScoreVector
microsoftCNA (assigner)3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
NVDNVD · Analyzed3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.35% · top 71% of all CVEs (7 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Weakness

Affected products

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

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Record last updated .