CVE-2005-1987

Exchange Server vulnerability

CVSS

7.5

EPSS

44.5%

EPSS pct

99th

Exploited

No known

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.

Affected vendor

Microsoft

Affected product

Exchange Server

CVSS vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Weakness type (CWE)

CWE-120 — Classic Buffer Overflow

Published

2005-10-13

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to confidentiality, partial impact to integrity, partial impact to availability.

Its EPSS score of 44.5% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it among the most exploited CVEs currently tracked.

Check your external exposure to CVE-2005-1987

Confirm whether Microsoft Exchange Server is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2005-1987.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2005-1987

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2005-1987 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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