CVE-2005-2127
HighExploitedPublic exploitMicrosoft 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…
Published Aug 19, 2005 · Updated Apr 15, 2026
Key Facts
Patch immediately- CVE-2005-2127 is a high-severity vulnerability (CVSS 7.5 v2) affecting Catalyst Driver (Ati), .net Framework (Microsoft), Office (Microsoft) and 3 more products.
- It is exploited in the wild, listed in Industry KEV feed since Oct 11, 2005. Public exploit code is available.
- EPSS estimates a 64% 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 v2
7.5
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS (30-day exploit likelihood)
64%
Higher than 99.2% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2005-2127 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
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, (5) Danim.dll, (6) Htmlmarq.ocx, (7) Mdt2dd.dll (as demonstrated using a heap corruption attack with uninitialized memory), (8) Mdt2qd.dll, (9) Mpg4ds32.ax, (10) Msadds32.ax, (11) Msb1esen.dll, (12) Msb1fren.dll, (13) Msb1geen.dll, (14) Msdtctm.dll, (15) Mshtml.dll, (16) Msoeacct.dll, (17) Msosvfbr.dll, (18) Mswcrun.dll, (19) Netshell.dll, (20) Ole2disp.dll, (21) Outllib.dll, (22) Psisdecd.dll, (23) Qdvd.dll, (24) Repodbc.dll, (25) Shdocvw.dll, (26) Shell32.dll, (27) Soa.dll, (28) Srchui.dll, (29) Stobject.dll, (30) Vdt70.dll, (31) Vmhelper.dll, and (32) Wbemads.dll, aka a variant of the "COM Object Instantiation Memory Corruption vulnerability."
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Oct 11, 2005 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
41 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Catalyst DriverAti | See advisory | n/a |
| .net FrameworkMicrosoft | 1.1, 1.1-sp1, 1.1-sp2, 1.1-sp3 | n/a |
| OfficeMicrosoft | 2000, 2000-sp1, 2000-sp2, 2000-sp3, xp-sp1, xp-sp2, xp-sp3 | n/a |
| ProjectMicrosoft | 2000, 2002, 2002-sp1, 2003, 2003-sp1, 98 | n/a |
| VisioMicrosoft | 2000-sr1, 2002, 2002-sp1, 2002-sp2, 2003, 2003-sp1 | n/a |
Timeline
Publicly disclosed
Aug 19, 2005
Added to Industry KEV feed
Oct 11, 2005
Last updated
Apr 15, 2026
Weakness Type
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
References
- advisoryhttp://isc.sans.org/diary.php?date=2005-08-18
- advisory17172
- advisory17223
- advisory17509
- advisory72
FAQ
Common Questions.
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 (…
Affected: Catalyst Driver (Ati); .net Framework (Microsoft) versions 1.1, 1.1-sp1, 1.1-sp2, 1.1-sp3; Office (Microsoft) versions 2000, 2000-sp1, 2000-sp2, 2000-sp3, xp-sp1, xp-sp2, xp-sp3, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Oct 11, 2005.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
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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