What is the CVSS score of CVE-2010-4398?

CVE-2010-4398 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 6.4%.

Which versions of Microsoft are affected by CVE-2010-4398?

CVE-2010-4398 presents notable security risk, a out-of-bounds write vulnerability rated CVSS 7.8.. A patch is available.

Is there a public PoC exploit available for CVE-2010-4398?

Yes, a public proof-of-concept exploit is available for CVE-2010-4398. Prioritise patching immediately. EPSS: 6.4%.

How to fix or mitigate CVE-2010-4398?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. If patching is delayed, consider network segmentation to limit exposure.

Microsoft CVE-2010-4398

HIGH

Out-of-bounds Write (CWE-787)

2010-12-06 cve@mitre.org

Buffer Overflow Microsoft Memory Corruption

7.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.8 HIGH

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Re-analysis Queued

Apr 21, 2026 - 15:22 vuln.today

cvss_changed

Analysis Generated

Mar 26, 2026 - 11:17 vuln.today

Added to CISA KEV

Oct 22, 2025 - 01:15 cisa

CISA KEV

PoC Detected

Oct 22, 2025 - 01:15 vuln.today

Public exploit code

Patch released

Oct 22, 2025 - 01:15 nvd

Patch available

CVE Published

Dec 06, 2010 - 13:44 nvd

HIGH 7.8

DescriptionCVE.org

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."

AnalysisAI

A stack-based buffer overflow in win32k.sys RtlQueryRegistryValues function allows local privilege escalation and UAC bypass on Windows XP through Windows 7 via crafted REG_BINARY registry values.

Technical ContextAI

The CWE-787 flaw is triggered when win32k.sys reads a REG_BINARY registry value with a length exceeding the expected stack buffer size. The kernel-mode driver copies the oversized data onto the stack, allowing an attacker to overwrite the return address and execute arbitrary kernel-mode code.

RemediationAI

Apply Microsoft security update MS11-011. Migrate to modern Windows versions with kernel exploit mitigations (SMEP, kCFG, kASLR). Monitor for suspicious registry modifications.