CVE-2021-34484
Microsoft Windows Server 2008 r2
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HSummary
CVE-2021-34484 is a high-severity an unspecified weakness vulnerability in Microsoft Windows Server 2008. Its CVSS base score is 7.8 (High).
Operationally, ranked in the top 3% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
The vulnerability is an elevation of privilege flaw in the Windows User Profile Service, assigned CVE-2021-34484 with a CVSS 3.1 base score of 7.8. It affects the Windows component responsible for managing user profiles and was published on 2021-08-12.
An attacker with local access and low privileges can exploit the issue without user interaction to obtain full control over confidentiality, integrity, and availability on the affected system, enabling privilege escalation to higher levels such as SYSTEM.
Microsoft has published security guidance addressing the vulnerability through its advisory portal, and the flaw appears in CISA's catalog of known exploited vulnerabilities, indicating confirmed real-world exploitation activity.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-21139
Vulnerability Data
Windows User Profile Service Elevation of Privilege Vulnerability
- CWE(s)
- KEV Date Added
- 31 March 2022
Related Threats
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Affected Assets
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.