CVE-2024-43639 — Windows KDC Proxy Remote Code Execution Vulnerability

Executive Summary

None

Overview

9.8

CVSS CRITICAL

Critical

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Remote Code Execution

Weakness CWE-197: Numeric Truncation Error

Released Nov 12 2024

Last Updated Nov 12 2024

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.08749 — 0.94603 percentile

NVD CVSS 9.8 CRITICAL — matches MSRC

CVSS Vector

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

ATTACK VECTOR

Network

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

None

USER INTERACTION

None

SCOPE

Unchanged

CONFIDENTIALITY

High

INTEGRITY

High

AVAILABILITY

High

EXPLOIT CODE MATURITY

Unproven

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 8.5

EPSS Score

0.08749

probability of exploitation in the next 30 days

0.94603 percentile - updated 2026-07-25

View on FIRST.org

Affected Products

9 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows Server 2012	`5046697 (Monthly Rollup)`	Critical	Remote Code Execution	Yes
Windows Server 2012 (Server Core installation)	`5046697 (Monthly Rollup)`	Critical	Remote Code Execution	Yes
Windows Server 2012 R2	`5046682 (Monthly Rollup)`	Critical	Remote Code Execution	Yes
Windows Server 2012 R2 (Server Core installation)	`5046682 (Monthly Rollup)`	Critical	Remote Code Execution	Yes
Windows Server 2016	`5046612 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2016 (Server Core installation)	`5046612 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2019	`5046615 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2019 (Server Core installation)	`5046615 (Security Update)`	Critical	Remote Code Execution	Yes
Windows Server 2022 5046616 (Security Update) 5046698 (SecurityHotpatchUpdate) Critical Remote Code Execution 5044281 Base: 9.8 Temporal: 8.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.20348.2849 10.0.20348.2819 Yes None Windows Server 2022 (Server Core installation) 5046616 (Security Update) 5046698 (SecurityHotpatchUpdate) Critical Remote Code Execution 5044281 Base: 9.8 Temporal: 8.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 10.0.20348.2849 10.0.20348.2819 Yes None Windows Server 2022, 23H2 Edition (Server Core installation)	`5046618 (Security Update)`	Critical	Remote Code Execution	Yes

Patches

5 patches

Article	Type	Restart
`5046697`	Monthly Rollup	Yes
`5046682`	Monthly Rollup	Yes
`5046612`	Security Update	Yes
`5046615`	Security Update	Yes
`5046618`	Security Update	Yes

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Wei in Kunlun Lab with Cyber KunLun
k0shl

References

MSRC Advisory MITRE NVD