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CVE

CVE-2022-21894

Secure Boot Security Feature Bypass Vulnerability

Secure Boot Security Feature Bypass Vulnerability.

MEDIUM · CVSS 4.4 EPSS 0.33643
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  • SSVC exploitation status: active
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 3% of all CVEs by exploitation likelihood
Sigma rules10 YARA rules0
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Threat Actors Linked

1
actorBlackLotus
⬡

Weakness Classification

CWE-863Incorrect Authorization
▤

Affected Products & Versions

7
microsoft windows 10all versions
microsoft windows 11all versions
microsoft windows 8.1all versions
microsoft windows serverall versions
microsoft windows server 2012all versions
microsoft windows server 2016all versions
microsoft windows server 2019all versions
◈

Sigma Hunt Rules

10
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
relatedcriticalAntivirus Password Dumper Detection
relatedcriticalHacktool Execution - Imphash
relatedcriticalHackTool - Rubeus Execution
relatedcriticalPotential Credential Dumping Via LSASS Process Clone
relatedcriticalWCE wceaux.dll Access
relatedcriticalRenamed Whoami Execution
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Scoring & Timeline

4.4
MEDIUM · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD11 Jan 2022 · 09:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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Vendor Advisories

5
msrcCVE-2022-21894Security Feature Bypass
splunk-security-content4f7e3913-4db3-4ccd-afe4-31198982305d
splunk-security-contentb061dfcc-f0aa-42cc-a6d4-a87f172acb79
splunk-security-contenteabbac3a-45aa-4659-920f-6b8cff383fb8
splunk-security-content65615b3a-62ea-4d65-bb9f-6f07c17df4ea
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-21894
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