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Microsoft · Windows

CVE-2008-4250

Microsoft Windows Buffer Overflow Vulnerability

Exploited in attacks Critical 9.8 Attack chance: 99%
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What it is

The Server service in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP1 and SP2, Vista Gold and SP1, Server 2008, and 7 Pre-Beta allows remote attackers to execute arbitrary code via a crafted RPC request that triggers the overflow during path canonicalization, as exploited in the wild by Gimmiv.A in October 2008, aka "Server Service Vulnerability."

CISA: Microsoft Windows contains a buffer overflow vulnerability in the Windows Server Service that allows remote attackers to execute arbitrary code via a crafted RPC request that triggers an overflow during path canonicalization.

What to do

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Deadline for US federal agencies: June 3, 2026

Added to the CISA list
May 20, 2026
Published
October 23, 2008
Severity
Critical 9.8 CVSS 3.1
Chance of attacks in the next 30 days (EPSS)
99% in the top 0.1% of all known vulnerabilities
Weakness
CWE-94
More details
NVD · CVE.org · CISA
All references (19)

More exploited flaws from Microsoft

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Oct 13, 2026Command InjectionCVE-2026-96951WindowsHigh 8.89.8%
Sep 8, 2026Link FollowingCVE-2026-81963WindowsHigh 7.80.4%
Sep 8, 2026Heap-Based Buffer OverflowCVE-2026-85880WindowsHigh 7.80.4%
Apr 28, 2026Protection Mechanism FailureCVE-2026-32202WindowsMedium 4.371%
Apr 13, 2026Out-of-Bounds ReadCVE-2023-36424WindowsHigh 7.812%
Apr 13, 2026Link FollowingCVE-2025-60710used by ransomwareWindowsHigh 7.84.6%
Feb 17, 2026 Microsoft Windows Video ActiveX Control Remote Code ExecutionCVE-2008-0015WindowsHigh 8.877%
Feb 10, 2026Shell Protection Mechanism FailureCVE-2026-21510WindowsHigh 8.861%

All of them →

Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.