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Actively exploited · Published Oct 23, 2008 · Assigned by microsoft

CVE-2008-4250

Critical 9.8 Exploited

In plain English

A critical-severity memory corruption in Windows from Microsoft. Attackers are actively exploiting it in the wild (listed by CISA on May 20, 2026). The chance it is exploited in the next 30 days is estimated at 98.8% (higher than 99.9% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, public proof-of-concept code. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)98.8%top 0.1% of all CVEs
Exploited in the wildYesCISA KEV since May 20, 2026
Attack tooling2Metasploit, Public PoC

CISA guidance

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

Federal agencies must remediate by Jun 3, 2026.

Official description

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."

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

Weakness: CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References