CVE-2006-0027
HighUnspecified vulnerability in Microsoft Exchange allows remote attackers to execute arbitrary code via e-mail messages with crafted (1) vCal or (2) iCal Calendar properties.
Published May 9, 2006 · Updated Apr 15, 2026
Key Facts
Patch immediately- CVE-2006-0027 is a high-severity vulnerability (CVSS 7.5 v2) affecting Exchange Server (Microsoft).
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 79% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v2
7.5
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS (30-day exploit likelihood)
79%
Higher than 99.5% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2006-0027 brief as a PDF
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Description
Unspecified vulnerability in Microsoft Exchange allows remote attackers to execute arbitrary code via e-mail messages with crafted (1) vCal or (2) iCal Calendar properties.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Exchange ServerMicrosoft | 2000-sp3, 2003-sp1, 2003-sp2 | n/a |
Timeline
Publicly disclosed
May 9, 2006
Last updated
Apr 15, 2026
References
- advisory20029
- advisory1016048
- advisoryexchange-calendar-code-execution(25556)
- advisoryoval:org.mitre.oval:def:1818
- advisoryoval:org.mitre.oval:def:1996
FAQ
Common Questions.
Unspecified vulnerability in Microsoft Exchange allows remote attackers to execute arbitrary code via e-mail messages with crafted (1) vCal or (2) iCal Calendar properties.
Affected: Exchange Server (Microsoft) versions 2000-sp3, 2003-sp1, 2003-sp2. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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