CVE-2024-43451: Microsoft Windows NTLMv2 Hash Disclosure Spoofing Vulnerability
Microsoft · Windows · NVD published 2024-11-13 · posted 2024-11-12 · last modified 2026-06-17
What it is
NTLM Hash Disclosure Spoofing Vulnerability
| Weakness | CWE-73 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N (source: [email protected]) |
| CISA due date | 2024-12-03 (for US federal agencies under BOD; a good deadline for everyone) |
| ATT&CK tactics | n/a |
Exploitation evidence
First exploit evidence seen: 2024-11-12 (earliest date across the sources below).
Exploited in the wild
- CISA KEV: listed since 2024-11-12. Source
Public exploit code
GitHub proof-of-concept repositories
2 public repositories from 2 accounts, first seen 2025-01-20. Most starred: RonF98/CVE-2024-43451-POC (15 stars), view repository.
Verify before running: public PoCs can be malicious. Read the code and only run it in an isolated lab. A PoC means exploit code is public, not that this CVE is exploited in the wild.
Sources: CISA KEV · nomi-sec/PoC-in-GitHub.
No ATT&CK techniques could be mapped or inferred for this CVE yet.
How to fix it
CISA required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. (source: CISA KEV)
Fixed versions
- microsoft windows 10 1507: upgrade to 10.0.10240.20826 or later
- microsoft windows 10 1607: upgrade to 10.0.14393.7515 or later
- microsoft windows 10 1809: upgrade to 10.0.17763.6532 or later
- microsoft windows 10 21h2: upgrade to 10.0.19044.5131 or later
- microsoft windows 10 22h2: upgrade to 10.0.19045.5131 or later
- microsoft windows 11 22h2: upgrade to 10.0.22621.4460 or later
- microsoft windows 11 23h2: upgrade to 10.0.22631.4460 or later
- microsoft windows 11 24h2: upgrade to 10.0.26100.2314 or later
- microsoft windows server 2016: upgrade to 10.0.14393.7515 or later
- microsoft windows server 2019: upgrade to 10.0.17763.6532 or later
- microsoft windows server 2022: upgrade to 10.0.20348.2849 or later
- microsoft windows server 2022 23h2: upgrade to 10.0.25398.1251 or later
- microsoft windows server 2025: upgrade to 10.0.26100.2314 or later
Derived from the NVD CPE configuration (versionEndExcluding / versionEndIncluding). Always confirm with the vendor advisory.
Vendor advisories and patches
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43451 (CISA KEV notes)
Detection Generic guidance
Response checklist Generic guidance
- Inventory: find every instance of the affected product and version (include internet-facing and forgotten ones).
- Patch or mitigate per the vendor advisory; if you cannot patch, remove internet exposure or apply the vendor workaround.
- Assume compromise if the system was exposed before patching: hunt for the indicators in the advisory and review logs back to the disclosure date.
- Rotate credentials and secrets stored on or used by the affected system if compromise cannot be ruled out.