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Vulnerabilities

Vulnerability · CVE-2008-4033

Cross-domain vulnerability in Microsoft XML Core Services 3.0 through 6.0, as used in Microsoft Expression Web, Office, Internet Explorer, and other products, allows r…

Published Nov 12, 2008 · catalog updated Jun 16, 2026 · xml core services

Last checked Nov 2, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2008-4033 is not in CISA KEV. FIRST estimates a 27.75% chance of exploitation in the next 30 days. Check whether you run xml core services.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium4.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
27.75%
Remediation
Advisory link
Affected products
cpe microsoft/xml core services

Cross-domain vulnerability in Microsoft XML Core Services 3.0 through 6.0, as used in Microsoft Expression Web, Office, Internet Explorer, and other products, allows remote attackers to obtain sensitive information from another domain and corrupt the session state via HTTP request header fields, as demonstrated by the Transfer-Encoding field, aka "MSXML Header Request Vulnerability."

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe microsoft/xml core services3.0
  • cpe microsoft/xml core services4.0
  • cpe microsoft/xml core services5.0
  • cpe microsoft/xml core services6.0

How to fix CVE-2008-4033

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2008-4033 is not in CISA KEV. FIRST estimates a 27.75% chance of exploitation in the next 30 days. Check whether you run xml core services.

Which versions are affected?

Compare what you have installed with microsoft/xml core services 3.0; microsoft/xml core services 4.0; microsoft/xml core services 5.0; microsoft/xml core services 6.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-200: Exposure of Sensitive Information. EPSS 27.75%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 12, 2008 · Monitored products — critical

    Detected

    Cross-domain vulnerability in Microsoft XML Core Services 3.0 through 6.0, as used in Microsoft Expression Web, Office, Internet Explorer, and other products, allows remote attackers to obtain sensitive information from another domain and corrupt the session state via HTTP request header fields, as demonstrated by the Transfer-Encoding field, aka "MSXML Header Request Vulnerability."

  2. Jun 16, 2026 · Monitored products — critical

    Updated

    Cross-domain vulnerability in Microsoft XML Core Services 3.0 through 6.0, as used in Microsoft Expression Web, Office, Internet Explorer, and other products, allows remote attackers to obtain sensitive information from another domain and corrupt the session state via HTTP request header fields, as demonstrated by the Transfer-Encoding field, aka "MSXML Header Request Vulnerability."

Sources

  • CVE.orgVulnerability recordCVE-2008-4033

    Official CVE identifier

    cve.org
  • Monitored products — criticalVendor advisoryCVE-2008-4033

    Cross-domain vulnerability in Microsoft XML Core Services 3.0 through 6.0, as used in Microsoft Expression Web, Office, Internet Explorer, and other products, allows remote attackers to obtain sensitive information from another domain and corrupt the session state via HTTP request header fields, as demonstrated by the Transfer-Encoding field, aka "MSXML Header Request Vulnerability."

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 2, 2026
  • Monitored products — criticalNov 1, 2026