Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2009-1138

45
FAUCET Score

CVE-2009-1138 describes a critical memory management vulnerability in the LDAP service of Active Directory on Microsoft Windows 2000 SP4. This flaw, likely a memory leak, allows remote attackers to execute arbitrary code by sending specially crafted LDAP or LDAPS requests utilizing hexadecimal encoding for a "DN AttributeValue," which causes memory to not be properly freed. With a CVSS score of 10.0, this vulnerability is highly severe, requiring no authentication and having low attack complexity, leading to complete compromise of confidentiality, integrity, and availability. Despite its critical nature and high EPSS score, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_2000:*:sp4:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

AV:N/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
39.40%
Probability of exploitation in next 30 days
EPSS Percentile
98.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.3940 is in the 97th percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

labs.idefense.com / intelligence/vulnerabilities/display.php
osvdb.org / 54937
docs.microsoft.com / en-us/security-updates/securitybulletins/2009/ms09-018
secunia.com / advisories/35355
Vendor Advisory
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6180
support.avaya.com / elmodocs2/security/ASA-2009-214.htm
securityfocus.com / bid/35226
Patch
securitytracker.com / id
us-cert.gov / cas/techalerts/TA09-160A.html
US Government Resource
vupen.com / english/advisories/2009/1537
PatchVendor Advisory