Is CVE-2008-4299 being actively exploited?

CVE-2008-4299 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2008-4299?

CVE-2008-4299 has a CVSS 2.0 base score of 5.0 (MEDIUM).

CVE-2008-4299

MEDIUM · CVSS 5.0EPSS 15.9%EU EUVD

A certain ActiveX control in the Microsoft Internet Authentication Service (IAS) Helper COM Component in iashlpr.dll allows remote attackers to cause a denial of service (browser crash) via a large integer value in the first argument to the PutProperty method. NOTE: this issue was disclosed by an unreliable researcher, so it might be incorrect.

Key facts

CVSS score: 5.0 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness (CWE): CWE-189
EPSS score: 15.9% (97th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2008-4282)
Published: September 29, 2008
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2008-4282 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

microsoft / internet authentication service helper com component

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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