CVE-2024-43455
Published: 10 September 2024
Summary
CVE-2024-43455 is a high-severity Improper Input Validation (CWE-20) vulnerability in Microsoft Windows Server 2008. Its CVSS base score is 8.8 (High).
Operationally, ranked in the top 10.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2024-43455 is a spoofing vulnerability affecting the Windows Remote Desktop Licensing Service. It carries a CVSS 3.1 base score of 8.8 and is associated with CWE-20, indicating improper input validation that can be leveraged to present falsified data to the service.
An attacker with low privileges can exploit the flaw remotely over the network without requiring user interaction. Successful exploitation allows the adversary to spoof licensing-related messages, resulting in high impact to confidentiality, integrity, and availability on the affected system.
The primary advisory reference is the Microsoft Security Response Center entry at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43455, which security teams should consult for official patch availability and mitigation guidance.
The associated EPSS score rose from lower values to a peak of 0.0715 on 2025-12-11 before receding to the current level of 0.0480.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-40724
Vulnerability details
Windows Remote Desktop Licensing Service Spoofing Vulnerability
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Security testing and developer training directly verify and enforce proper input validation, reducing exploitability of injection and malformed-data weaknesses.
Security testing and evaluation at multiple SDLC stages directly detects missing or flawed input validation, with the required remediation process ensuring fixes are applied.
Directly implements checks on information inputs to reject invalid data before processing.
Spam protection mechanisms perform filtering and detection on inbound/outbound messages, directly compensating for missing or weak input validation of unsolicited content.