How severe is CVE-2009-0419?

CVE-2009-0419 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2009-0419 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0419?

CVE-2009-0419 affects Microsoft Xml Core Services. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-0419?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-0419 published?

CVE-2009-0419 was published on 2009-02-04 and last updated on 2026-06-16.

CVE-2009-0419

CVE-2009-0419 is a medium-severity vulnerability in Microsoft Xml Core Services with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 15% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-264.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 15% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Microsoft Xml Core Services
Published: 2009-02-04
Last modified: 2026-06-16

Description

Microsoft XML Core Services, as used in Microsoft Expression Web, Office, Internet Explorer 6 and 7, and other products, does not properly restrict access from web pages to Set-Cookie2 HTTP response headers, which allows remote attackers to obtain sensitive information from cookies via XMLHttpRequest calls, related to the HTTPOnly protection mechanism. NOTE: this issue reportedly exists because of an incomplete fix for CVE-2008-4033.

Frequently asked questions

What is CVE-2009-0419?: Microsoft XML Core Services, as used in Microsoft Expression Web, Office, Internet Explorer 6 and 7, and other products, does not properly restrict access from web pages to Set-Cookie2 HTTP response headers, which allows remote attackers to obtain sensitive information from cookies via XMLHttpRequest calls, related to the HTTPOnly protection mechanism. NOTE: this issue reportedly exists because of an incomplete fix for CVE-2008-4033.
How severe is CVE-2009-0419?: CVE-2009-0419 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2009-0419 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0419?: CVE-2009-0419 affects Microsoft Xml Core Services. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-0419?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-0419 published?: CVE-2009-0419 was published on 2009-02-04 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:microsoft:xml_core_services:*:*:*:*:*:*:*:*

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