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NVD / CVE Program· CNA microsoft

CVE-2024-21338: Windows Kernel Elevation of Privilege Vulnerability

HighCVSS 7.8 · v3.1KEVWeaponized No fix recorded

Noroxi assessment

Priority: Now (action score 80/100)

  • CISA has confirmed exploitation in the wild (Mar 4, 2024); it is known to be used in ransomware campaigns. Remediation deadline for US federal agencies: Mar 25, 2024.
  • Probability of exploitation in the next 30 days: 62.2% (FIRST EPSS); higher than 99.1% of all records.
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Patch today or shut off access. Until a fix is released, restrict access to the affected component and follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

Published
Feb 13, 2024
Updated
Aug 10, 2026
EPSS
62.2% · 99th percentile

Report tools

JSON

Action score

80

Now

Patch today or shut off access.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
30 / 30 · Listed
EPSS
19 / 30 · 62.2%

CISA SSVC decision

Exploitation
active
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · microsoft
7.8
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Mar 4, 2024. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Mar 25, 2024.

Known to be used in ransomware campaigns.

Get told when this record changes

  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2024-21338

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
microsoftwindows 10 1809
microsoftwindows 10 21h2
microsoftwindows 10 22h2
microsoftwindows 11 21h2
microsoftwindows 11 22h2
microsoftwindows 11 23h2
microsoftwindows server 2019
microsoftwindows server 2022
microsoftwindows server 2022 23h2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.

  • Microsoft Windows 10 Version 1809

    • 10.0.17763.0 and later · before 10.0.17763.5458affected
    • 10.0.0 and later · before 10.0.17763.5458affected

  • Microsoft Windows 10 Version 21H2

    • 10.0.19043.0 and later · before 10.0.19044.4046affected

  • Microsoft Windows 10 Version 22H2

    • 10.0.19045.0 and later · before 10.0.19045.4046affected

  • Microsoft Windows 11 version 21H2

    • 10.0.0 and later · before 10.0.22000.2777affected

  • Microsoft Windows 11 version 22H2

    • 10.0.22621.0 and later · before 10.0.22621.3155affected

  • Microsoft Windows 11 version 22H3

    • 10.0.22631.0 and later · before 10.0.22631.3155affected

  • Microsoft Windows 11 Version 23H2

    • 10.0.22631.0 and later · before 10.0.22631.3155affected

  • Microsoft Windows Server 2019

    • 10.0.17763.0 and later · before 10.0.17763.5458affected

  • Microsoft Windows Server 2019 (Server Core installation)

    • 10.0.17763.0 and later · before 10.0.17763.5458affected

  • Microsoft Windows Server 2022

    • 10.0.20348.0 and later · before 10.0.20348.2322affected

  • Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)

    • 10.0.25398.0 and later · before 10.0.25398.709affected

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • microsoft windows server 2019before 10.0.17763.5458
  • microsoft windows server 2022before 10.0.20348.2322
  • microsoft windows server 2022 23h2up to 10.0.25398.709 inclusive

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-21412Internet Shortcut Files Security Feature Bypass VulnerabilityKEV
    92Now
  • CVE-2021-36934Windows Elevation of Privilege VulnerabilityKEV
    81Now
  • CVE-2024-29988SmartScreen Prompt Security Feature Bypass VulnerabilityKEV
    79This week

Published before and after this one in the same product

  • ← EarlierCVE-2024-21310Jan 9, 2024 · Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
    34Monitor
  • ← EarlierCVE-2024-21304Feb 13, 2024 · Trusted Compute Base Elevation of Privilege Vulnerability
    16Monitor
  • Later →CVE-2024-21339Feb 13, 2024 · Windows USB Generic Parent Driver Remote Code Execution Vulnerability
    25Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Exploit-DB entry ×2
  • Proof-of-concept repository on GitHub ×8

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHub8 repositories2024-04-13 → 2026-03-11
Exploit-DB entrylocal2024-04-02
Exploit-DB entrylocal2025-04-22

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. CISA KEV+19 d
  3. First PoC+48 d
  4. TodayNov 12, 2026+1003 d
EPSS, last 120 days+2% in 7 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2023-3603391 days apartWindows DWM Core Library Elevation of Privilege VulnerabilityKEV
    64This week
  • CVE-2024-43624273 days apartWindows Hyper-V Shared Virtual Disk Elevation of Privilege Vulnerability
    36Monitor
  • CVE-2024-43629273 days apartWindows DWM Core Library Elevation of Privilege Vulnerability
    32Monitor
  • CVE-2024-2625456 days apartMicrosoft Virtual Machine Bus (VMBus) Denial of Service Vulnerability
    31Monitor
  • CVE-2025-27739420 days apartWindows Kernel Elevation of Privilege Vulnerability
    31Monitor

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Not on record for this CVE: patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-822 · Untrusted Pointer Dereference

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records