CVE-2009-1216

Multiple unspecified vulnerabilities in (1) unlzh.c and (2) unpack.c in the gzip libraries in Microsoft Windows Server 2008, Windows Services for UNIX 3.0 and 3.5, and the Subsystem for UNIX-based Applications (SUA); as used in gunzip, gzip, pack, pcat, and unpack 7.x before 7.0.1701.48, 8.x before 8.0.1969.62, and 9.x before 9.0.3790.2076; allow remote attackers to execute arbitrary code via unknown vectors.

Published: 2009-04-01 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-1216 is rated High Risk (69.2/100): CVSS Critical severity, with high exploitation likelihood (EPSS 24.49%, 98th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2009-1216

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 42.57% 24.49% -18.08%
2 2025-08-21 40.02% 42.57% +2.55%
3 2025-03-30 — 40.02% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-1216

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2009-1216

Affected software / configurations for CVE-2009-1216

Vendor Product Version Raw CPE
microsoft subsystem_for_unix-based_applications — cpe:2.3:a:microsoft:subsystem_for_unix-based_applications:*:*:*:*:*:*:*:*
microsoft windows_services_for_unix 3.0 cpe:2.3:a:microsoft:windows_services_for_unix:3.0:-:std:*:*:*:*:*
microsoft windows_services_for_unix 3.5 cpe:2.3:a:microsoft:windows_services_for_unix:3.5:*:*:*:*:*:*:*
microsoft windows_server_2008 — cpe:2.3:o:microsoft:windows_server_2008:*:*:*:*:*:*:*:*
microsoft windows_vista — cpe:2.3:o:microsoft:windows_vista:*:*:*:*:*:*:*:*
microsoft windows_vista — cpe:2.3:o:microsoft:windows_vista:*:*:enterprise:*:*:*:*:*
microsoft windows_vista — cpe:2.3:o:microsoft:windows_vista:*:*:ultimate:*:*:*:*:*

References for CVE-2009-1216

cvelogic Threat Intelligence