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CVE-2005-2127: Microsoft Internet Explorer 5.01, 5.5, and 6 allows remote attackers to cause a denial of service (application

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This week
HIGH 7.5WATCHLISTMITIGATEDOWNGRADEDOWNGRADE

CVE-2005-2127 is a high-severity flaw (CVSS 7.5) affecting catalyst driver, .net framework, office. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Microsoft Internet Explorer 5.01, 5.5, and 6 allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via a web page with embedded CLSIDs that reference certain COM objects that are not intended for use within Internet Explorer, as originally demonstrated using the (1) DDS Library Shape Control (Msdds.dll) COM object, and other objects including (2) Blnmgrps.dll, (3) Ciodm.dll, (4) Comsvcs.dll,

Why this priority

  • High severity
  • EPSS top 1%: very likely to be exploited
  • Public exploit reference
  • On your watchlist

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

Risk facts

CVSS score7.5 (High)
EPSS exploit chance63.2% (top 1%)
CISA exploited listNo
WeaknessCWE-119
Published2005-08-19
Last modified2026-06-16
Publisher (CNA): Microsoft Corporation · Vendor: ati · microsoft

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

Am I affected?

Timeline

ati catalyst driver MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy catalyst-driver || rpm -q catalyst-driver || catalyst-driver --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
microsoft .net framework DOWNGRADE
Affected: 1.1 · 1.1 sp1 · 1.1 sp2 · 1.1 sp3
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.1
1. Check installed version
apt-cache policy .net-framework || rpm -q .net-framework || .net-framework --version
2. No fixed release: DOWNGRADE to a release before 1.1 (Debian / Ubuntu)
apt-cache madison .net-framework sudo apt install .net-framework=<VERSION_BEFORE_1.1> sudo apt-mark hold .net-framework
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list .net-framework sudo dnf downgrade .net-framework-<VERSION_BEFORE_1.1> sudo dnf versionlock add .net-framework
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
microsoft office DOWNGRADE
Affected: all versions · 2000 · 2000 sp1 · 2000 sp2 · 2000 sp3 · xp sp1 · xp sp2 · xp sp3
Fixed in: no fixed release known
Safe to downgrade to: a release before 2000
1. Check installed version
apt-cache policy office || rpm -q office || office --version
2. No fixed release: DOWNGRADE to a release before 2000 (Debian / Ubuntu)
apt-cache madison office sudo apt install office=<VERSION_BEFORE_2000> sudo apt-mark hold office
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list office sudo dnf downgrade office-<VERSION_BEFORE_2000> sudo dnf versionlock add office
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
microsoft project DOWNGRADE
Affected: 98 · 2000 · 2002 · 2002 sp1 · 2003 · 2003 sp1
Fixed in: no fixed release known
Safe to downgrade to: a release before 98
1. Check installed version
apt-cache policy project || rpm -q project || project --version
2. No fixed release: DOWNGRADE to a release before 98 (Debian / Ubuntu)
apt-cache madison project sudo apt install project=<VERSION_BEFORE_98> sudo apt-mark hold project
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list project sudo dnf downgrade project-<VERSION_BEFORE_98> sudo dnf versionlock add project
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
microsoft visio DOWNGRADE
Affected: 2000 sr1 · 2002 · 2002 sp1 · 2002 sp2 · 2003 · 2003 sp1
Fixed in: no fixed release known
Safe to downgrade to: a release before 2000
1. Check installed version
apt-cache policy visio || rpm -q visio || visio --version
2. No fixed release: DOWNGRADE to a release before 2000 (Debian / Ubuntu)
apt-cache madison visio sudo apt install visio=<VERSION_BEFORE_2000> sudo apt-mark hold visio
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list visio sudo dnf downgrade visio-<VERSION_BEFORE_2000> sudo dnf versionlock add visio
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
microsoft visual studio .net DOWNGRADE
Affected: 2002 gold · 2003 · 2003 gold · gold
Fixed in: no fixed release known
Safe to downgrade to: a release before 2002
1. Check installed version
apt-cache policy visual-studio-.net || rpm -q visual-studio-.net || visual-studio-.net --version
2. No fixed release: DOWNGRADE to a release before 2002 (Debian / Ubuntu)
apt-cache madison visual-studio-.net sudo apt install visual-studio-.net=<VERSION_BEFORE_2002> sudo apt-mark hold visual-studio-.net
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list visual-studio-.net sudo dnf downgrade visual-studio-.net-<VERSION_BEFORE_2002> sudo dnf versionlock add visual-studio-.net
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.

Public exploits and detection

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

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-2005-2127?

catalyst driver: mitigate or apply the listed mitigation; .net framework: downgrade or apply the listed mitigation; office: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2005-2127 being exploited?

CVE-2005-2127 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-2005-2127 affect?

CVE-2005-2127 affects catalyst driver, .net framework, office. Severity is high (CVSS 7.5). Microsoft Internet Explorer 5.01, 5.5, and 6 allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via a web page with embedded CLSIDs that reference certain COM objects that are not in

How urgent is CVE-2005-2127?

Priority 61/100. High severity; EPSS top 1%: very likely to be exploited; Public exploit reference; On your watchlist

Software pages

Microsoft Office vulnerabilities · Internet Explorer vulnerabilities · .NET vulnerabilities · Visual Studio vulnerabilities

Related CVEs

References

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