CVE-2010-1735: The SfnLOGONNOTIFY function in win32k.sys in the kernel in Microsoft Windows 2000, XP, and Server 2003 allows

This month

MEDIUM 4.9WATCHLISTMITIGATEMITIGATEMITIGATE

CVE-2010-1735 is a medium-severity flaw (CVSS 4.9) affecting windows 2000, windows 2003 server, windows server 2003. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The SfnLOGONNOTIFY function in win32k.sys in the kernel in Microsoft Windows 2000, XP, and Server 2003 allows local users to cause a denial of service (system crash) via a 0x4c value in the second argument (aka the Msg argument) of a PostMessage function call for the DDEMLEvent window.

Why this priority

Public exploit reference
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.9 (Medium)
EPSS exploit chance	2.5% (top 15%)
CISA exploited list	No
Weakness	CWE-20
Published	2010-05-06
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: microsoft

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2010-05-06 12:47 UTCPublished CVE record published
2026-06-16 23:19 UTCUpdated Record last modified

microsoft windows 2000 MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

microsoft windows 2003 server MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

microsoft windows server 2003 MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

microsoft windows xp MITIGATE

Affected: all versions · sp3 · sp3 unknown

Fixed in: no fixed release known

Safe to downgrade to: a release before sp3

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Microsoft Windows XP/2000/2003 - 'win32k.sys' SfnLOGONNOTIFY Local kernel Denial of Service

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2010-1735?

windows 2000: mitigate or apply the listed mitigation; windows 2003 server: mitigate or apply the listed mitigation; windows server 2003: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2010-1735 being exploited?

CVE-2010-1735 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2010-1735 affect?

CVE-2010-1735 affects windows 2000, windows 2003 server, windows server 2003. Severity is medium (CVSS 4.9). The SfnLOGONNOTIFY function in win32k.sys in the kernel in Microsoft Windows 2000, XP, and Server 2003 allows local users to cause a denial of service (system crash) via a 0x4c value in the second argument (aka the Msg argument) of a PostMe

How urgent is CVE-2010-1735?

Priority 48/100. Public exploit reference; On your watchlist

Software pages

Windows vulnerabilities · Windows Server vulnerabilities

Related CVEs

CVE-2010-4562 MEDIUM 4.3 MITIGATE MITIGATE Microsoft Windows 2008, 7, Vista, 2003, 2000, and XP, when using IPv6, allows remote attackers to determine wh
CVE-2010-1734 MEDIUM 4.9 MITIGATE MITIGATE The SfnINSTRING function in win32k.sys in the kernel in Microsoft Windows 2000, XP, and Server 2003 allows loc
CVE-2010-1690 MEDIUM 6.4 MITIGATE MITIGATE The DNS implementation in smtpsvc.dll before 6.0.2600.5949 in Microsoft Windows 2000 SP4 and earlier, Windows
CVE-2010-1689 MEDIUM 6.4 MITIGATE MITIGATE The DNS implementation in smtpsvc.dll before 6.0.2600.5949 in Microsoft Windows 2000 SP4 and earlier, Windows
CVE-2010-1255 MEDIUM 6.8 MITIGATE MITIGATE The Windows kernel-mode drivers in win32k.sys in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2,

References

← Back to latest CVEs