How severe is CVE-2005-1987?

CVE-2005-1987 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2005-1987 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 43% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2005-1987?

CVE-2005-1987 primarily affects Microsoft Exchange Server. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2005-1987?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2005-1987 published?

CVE-2005-1987 was published on 2005-10-13 and last updated on 2026-06-16.

CVE-2005-1987

CVE-2005-1987 is a high-severity vulnerability in Microsoft Exchange Server with a CVSS 2.0 base score of 7.5. Its EPSS exploit-prediction score of 43% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-120.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 43% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Microsoft Exchange Server
Published: 2005-10-13
Last modified: 2026-06-16

Description

Buffer overflow in Collaboration Data Objects (CDO), as used in Microsoft Windows and Microsoft Exchange Server, allows remote attackers to execute arbitrary code when CDOSYS or CDOEX processes an e-mail message with a large header name, as demonstrated using the "Content-Type" string.

Frequently asked questions

What is CVE-2005-1987?: Buffer overflow in Collaboration Data Objects (CDO), as used in Microsoft Windows and Microsoft Exchange Server, allows remote attackers to execute arbitrary code when CDOSYS or CDOEX processes an e-mail message with a large header name, as demonstrated using the "Content-Type" string.
How severe is CVE-2005-1987?: CVE-2005-1987 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2005-1987 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 43% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-1987?: CVE-2005-1987 primarily affects Microsoft Exchange Server. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2005-1987?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2005-1987 published?: CVE-2005-1987 was published on 2005-10-13 and last updated on 2026-06-16.

References

Affected products (10)

cpe:2.3:a:microsoft:exchange_server:2000:sp3:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2000:-:sp4:*:fr:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2003:-:*:*:*:*:*:itanium:*
cpe:2.3:o:microsoft:windows_server_2003:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2003:r2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2003:sp1:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2003:sp1:*:*:*:*:*:itanium:*
cpe:2.3:o:microsoft:windows_xp:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_xp:-:sp1:*:*:tablet_pc:*:*:*
cpe:2.3:o:microsoft:windows_xp:-:sp2:*:*:tablet_pc:*:*:*

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