CVE-2009-1123: Microsoft Windows Improper Input Validation Vulnerability
Reference page built from the source records below, each shown as its source publishes it. Dataset version ref-fcc7d91fbd0a, updated 2026-11-02T23:39:54.475Z.
CISA Known Exploited Vulnerabilities
- Name
- Microsoft Windows Improper Input Validation Vulnerability
- Vendor
- Microsoft
- Product
- Windows
- Added to the catalog
- 2022-03-03
- Due date for US federal agencies
- 2022-03-24
- Weaknesses
- CWE-20
- Catalog version
- 2026.10.30
The kernel in Microsoft Windows does not properly validate changes to unspecified kernel objects, which allows local users to gain privileges via a crafted application.
Required action (CISA)
Apply updates per vendor instructions.
Ransomware use: CISA does not mark known use of this vulnerability in ransomware campaigns.
Links in CISA's notes
Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json
NVD analysis
- Status
- Analyzed
- Published
- 2009-06-10T18:30:00.327
- Last modified
- 2026-06-16T23:06:33.440
- Weaknesses
- NVD-CWE-noinfo
The kernel in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 SP2 does not properly validate changes to unspecified kernel objects, which allows local users to gain privileges via a crafted application, aka "Windows Kernel Desktop Vulnerability."
| Metric | Score | Severity | Vector | Scored by |
|---|---|---|---|---|
| CVSS 3.1 | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | [email protected] (Primary) |
| CVSS 3.1 | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
| CVSS 2.0 | 7.2 | HIGH | AV:L/AC:L/Au:N/C:C/I:C/A:C | [email protected] (Primary) |
References
- http://osvdb.org/54940 (Broken Link)
- http://secunia.com/advisories/35372 (Broken Link)
- http://www.securitytracker.com/id?1022359 (Broken Link, Third Party Advisory, VDB Entry)
- http://www.us-cert.gov/cas/techalerts/TA09-160A.html (Broken Link, Third Party Advisory, US Government Resource)
- http://www.vupen.com/english/advisories/2009/1544 (Broken Link)
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-025 (Patch, Vendor Advisory)
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6206 (Broken Link)
- http://osvdb.org/54940 (Broken Link)
- http://secunia.com/advisories/35372 (Broken Link)
- http://www.securitytracker.com/id?1022359 (Broken Link, Third Party Advisory, VDB Entry)
- http://www.us-cert.gov/cas/techalerts/TA09-160A.html (Broken Link, Third Party Advisory, US Government Resource)
- http://www.vupen.com/english/advisories/2009/1544 (Broken Link)
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-025 (Patch, Vendor Advisory)
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6206 (Broken Link)
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2009-1123 (US Government Resource)
This product uses the NVD API but is not endorsed or certified by the NVD.
Read on 2026-11-02T23:41:28.906Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2009-1123
CVE record
- Assigner
- microsoft
- State
- PUBLISHED
- Published
- 2009-06-10T18:00:00.000Z
- Updated
- 2025-10-22T00:05:54.609Z
- Problem types
- n/a
The kernel in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 SP2 does not properly validate changes to unspecified kernel objects, which allows local users to gain privileges via a crafted application, aka "Windows Kernel Desktop Vulnerability."
References
- 35372
- 54940
- ADV-2009-1544
- MS09-025
- 1022359
- oval:org.mitre.oval:def:6206
- TA09-160A
Read on 2026-11-03T00:12:14.609Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2009/1xxx/CVE-2009-1123.json
Sources and licences
CISA
Source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30, CC0 1.0. Use of this data does not imply endorsement by CISA or DHS.
National Vulnerability Database (NIST)
This product uses the NVD API but is not endorsed or certified by the NVD.
NVD API Terms of Use (NIST publications in the public domain, 17 U.S.C. 105)
CVE Program, The MITRE Corporation
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Cite this page
Dragons Eye Ransomware Tracker, "CVE-2009-1123: Microsoft Windows Improper Input Validation Vulnerability",
entity page, dataset version ref-fcc7d91fbd0a, updated 2026-11-02T23:39:54.475Z,
https://ransomware-tracker.com/cve/CVE-2009-1123 (accessed 2026-11-03).
Underlying source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30.
Underlying source: National Vulnerability Database (NIST), CVE API 2.0, record last modified 2026-06-16T23:06:33.440.
Underlying source: CVE List (CVE Program, The MITRE Corporation), record updated 2025-10-22T00:05:54.609Z.
Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.