CVE-2009-1123The 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…
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It affects microsoft windows_2000 and 4 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Mar 3, 2022; federal agencies had to remediate by Mar 24, 2022. Treat that date as your deadline.
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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."
- CVSS
- 7.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Added to CISA KEV Mar 3, 2022; federal remediation due Mar 24, 2022Apply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 4.88% (percentile 92)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 22, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
microsoft windows_2000 microsoft:windows_2000 | all versions | NVD |
microsoft windows_server_2003 microsoft:windows_server_2003 | all versions | NVD |
microsoft windows_server_2008 microsoft:windows_server_2008 | all versions | NVD |
microsoft windows_vista microsoft:windows_vista | all versions; all versions | NVD |
microsoft windows_xp microsoft:windows_xp | all versions; all versions; all versions | NVD |
References
- http://secunia.com/advisories/35372third-party-advisory, x-refsource-secunia, broken-link
- http://osvdb.org/54940vdb-entry, x-refsource-osvdb, broken-link
- http://www.vupen.com/english/advisories/2009/1544vdb-entry, x-refsource-vupen, broken-link
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-025vendor-advisory, x-refsource-ms, patch
- http://www.securitytracker.com/id?1022359vdb-entry, x-refsource-sectrack, broken-link, third-party-advisory
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6206vdb-entry, signature, x-refsource-oval, broken-link
- http://www.us-cert.gov/cas/techalerts/TA09-160A.htmlthird-party-advisory, x-refsource-cert, broken-link, us-government-resource
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2009-1123us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.