CVE-2010-4398
HighExploitedPublic exploitStack-based buffer overflow in the RtlQueryRegistryValues function in win32k.sys in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7 allows local users to gain privileges, and bypass the…
Published Dec 6, 2010 · Updated Apr 21, 2026
Key Facts
Patch immediately- CVE-2010-4398 is a high-severity vulnerability (CVSS 7.8 v3.1) affecting Windows 7 (Microsoft), Windows Server 2003 (Microsoft), Windows Server 2008 (Microsoft) and 2 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 1, 2016. Public exploit code is available.
- EPSS estimates a 8.7% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
8.7%
Higher than 95.0% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2010-4398 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Stack-based buffer overflow in the RtlQueryRegistryValues function in win32k.sys in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7 allows local users to gain privileges, and bypass the User Account Control (UAC) feature, via a crafted REG_BINARY value for a SystemDefaultEUDCFont registry key, aka "Driver Improper Interaction with Windows Kernel Vulnerability."
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Mar 28, 2022 | Apr 21, 2022 | Not reported |
| Industry KEV feed | Apr 1, 2016 | Apr 21, 2022 | Not reported |
| CIRCL KEV | Mar 28, 2022 | Apr 21, 2022 | Not reported |
| ENISA EUVD | Mar 28, 2022 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
9 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 7Microsoft | See advisory | n/a |
| Windows Server 2003Microsoft | See advisory | n/a |
| Windows Server 2008Microsoft | r2 | n/a |
| Windows VistaMicrosoft | See advisory | n/a |
| Windows XpMicrosoft | See advisory | n/a |
Timeline
Publicly disclosed
Dec 6, 2010
Added to Industry KEV feed
Apr 1, 2016
Added to CISA KEV
Mar 28, 2022
Added to CIRCL KEV
Mar 28, 2022
Added to ENISA EUVD
Mar 28, 2022
Last updated
Apr 21, 2026
Weakness Type
- CWE-787 Out-of-bounds Write
References
- advisory42356
- advisoryhttp://support.avaya.com/css/P8/documents/100127248
- advisoryVU#529673
- advisory45045
- advisory1025046
FAQ
Common Questions.
Stack-based buffer overflow in the RtlQueryRegistryValues function in win32k.sys in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7 allows local users to gain privileges, and bypass the User Account Control (UAC) feature, via a…
Affected: Windows 7 (Microsoft); Windows Server 2003 (Microsoft); Windows Server 2008 (Microsoft) versions r2, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Apr 1, 2016.
Yes. It was added on Mar 28, 2022 with a federal remediation due date of Apr 21, 2022.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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