CRITICAL
CVE-2009-2523
CWE-125Published: November 11, 2009· Updated: Jun 16, 2026
10.0
CVSS v3.1
Official Description
The License Logging Server (llssrv.exe) in Microsoft Windows 2000 SP4 allows remote attackers to execute arbitrary code via an RPC message containing a string without a null terminator, which triggers a heap-based buffer overflow in the LlsrLicenseRequestW method, aka "License Logging Server Heap Overflow Vulnerability."
Technical Analysis
CVE-2009-2523 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityC
IntegrityC
AvailabilityC
AV:N/AC:L/Au:N/C:C/I:C/A:C
Affected Vendors & Products
Microsoft1 product(s)
windows 2000
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
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Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories
All References (6)
→
http://www.us-cert.gov/cas/techalerts/TA09-314A.htmlThird Party Advisory · US Government Resource
→
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-064Mitigation · Patch · Vendor Advisory
→
→
http://www.us-cert.gov/cas/techalerts/TA09-314A.htmlThird Party Advisory · US Government Resource
→
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-064Mitigation · Patch · Vendor Advisory
Quick Facts
CVE IDCVE-2009-2523
CVSS Score10.0 / 10
SeverityCRITICAL
WeaknessCWE-125
CISA KEVNo
Affected1 vendor(s)
PublishedNov 11, 2009
Related CVEs (CWE-125)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2009-2523 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.