CVE-2008-4250

Exploitation: active CVSS 9.8 CRITICAL

CVSS base score: 9.8 (Critical) CISA · v3.1

Score assigned by CISA's Vulnrichment program; the vendor's CVE record did not include one.

Microsoft Windows Buffer Overflow Vulnerability

Vendor: Microsoft Product: Windows

Description

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.

Lifecycle Timeline

2008-10-23

CVE published

Entered the public CVE record.

CVE.org →
2008-10-23

Public exploit code

Exploit-DB — Microsoft Windows Server - Code Execution (PoC) (MS08-067)

Exploit-DB →
2026-05-20

Added to CISA KEV 17.6 years later

Listed as known exploited, which starts the federal remediation clock.

CISA KEV →
2026-06-03

Federal remediation due 14 days later

Deadline for federal civilian agencies under BOD 22-01 — now passed.

CISA KEV
not recorded

EPSS flags exploitation risk

First scored at 90.9% when an EPSS model update added it on 2022-02-05. That reflects the model, not new evidence about this CVE.
not recorded

First national advisory

No tracked government advisory analyses this CVE. Routine KEV catalog-addition alerts do not count here.
not recorded

Vendor fix published

No dated vendor fix. Only Microsoft publishes a machine-readable release date; other vendors state a fixed version without one.

Each milestone comes from a different source, so gaps between them are gaps in what those sources publish, not evidence that nothing happened. EPSS history for this CVE holds 254 points from 2022-02-05, tracked daily from 2026-09-09; earlier points are weekly, which dates a spike to within a week. Peak probability 98.8% on 2026-06-20.

Published Applicability

CVE List v5 (CNA container) 1 affected · 0 fixed · 0 not affected

Check whether a specific version is affected →

What each source publishes about which product versions carry this vulnerability, kept as written rather than merged. Absence here means no source has published applicability data, not that nothing is affected.

Research & News Coverage

No mentions found in monitored research blogs or news feeds.

Detection & Exploitation

Scan

OpenVAS / Greenbone NVT6

Exploit / Pen Test

Exploit-DB6 Metasploit GitHub PoC4

Network IDS/IPS

Snort (ET Open)32 Suricata (ET Open)32

Host / SIEM

none published

Coverage across public collections only: Nuclei and OpenVAS NVT (scan); Snort and Suricata ET Open (network); Sigma and YARA (host/SIEM); Metasploit, Exploit-DB and public GitHub repositories (exploit). Absence here means nothing public was found, not that detection is impossible.
GitHub PoC repositories are collected automatically by PoC-in-GitHub (CC0) and are not vetted: some are fakes and some are malware. Treat them as evidence that code was published, not as code to run.
OpenVAS coverage derives from the Greenbone Community Feed, made available under the Open Database License (ODbL) v1.0; its individual Vulnerability Tests are licensed GNU GPL v2.

CISA Assessment (Vulnrichment / SSVC)

Exploitation

active

Automatable

yes

Technical impact

total

CVSS — CISA 3.1

9.8 CRITICAL

CVSS — vendor CNA

—

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Assessment updated

2026-05-20

D3FEND Countermeasures

Defensive techniques inferred by MITRE D3FEND from the underlying weakness (CWE-119) — general hardening and detection guidance for this weakness class, not a vendor patch for this specific CVE.

Model

Asset Vulnerability Enumeration Software Inventory

Harden

Credential Scrubbing Domain Logic Validation Memory Block Start Validation Null Pointer Checking Reference Nullification Software Update Trusted Library Variable Initialization Variable Type Validation

Isolate

Application-based Process Isolation

Restore

Restore Software

KEV Catalog Status

Added to KEV

2026-05-20

BOD 22-01 due date

2026-06-03

Known ransomware use

Unknown

Listed By

Source	Date	Record
CISA KEV	2026-05-20	source record →
CISA Vulnrichment	2026-05-20	source record →

Weaponization Timeline — Offensive & Testing Tools

Date	Tool	Evidence quality	Reference
—	Metasploit	Direct — curated exploit code	MS08-067 Microsoft Server Service Relative Path Stack Corruption
2008-10-23	ExploitDB	Direct — curated exploit code	Microsoft Windows Server - Code Execution (PoC) (MS08-067)
2008-10-26	ExploitDB	Direct — curated exploit code	Microsoft Windows Server - Universal Code Execution (MS08-067)
2008-11-12	ExploitDB	Direct — curated exploit code	Microsoft Windows Server - Code Execution (MS08-067)
2008-11-16	ExploitDB	Direct — curated exploit code	Microsoft Windows Server 2000/2003 - Code Execution (MS08-067)
2011-01-21	ExploitDB	Direct — curated exploit code	Microsoft Windows Server - Service Relative Path Stack Corruption (MS08-067) (Metasploit)
2016-02-26	ExploitDB	Direct — curated exploit code	Microsoft Windows - 'NetAPI32.dll' Code Execution (Python) (MS08-067)

Evidence tiers are explained on the About page — a merged Metasploit module is far stronger evidence than a distro package mention.

External References

CVE.org record → NVD entry → CISA KEV catalog → Microsoft MSRC advisory → FortiGuard Labs → Rapid7 AttackerKB →

⚠ Known Exploited Vulnerability (KEV) Tracker