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Vulnerability record · CVE-2007-0039 · published 8 May 2007

CVE-2007-0039: Microsoft exchange server null pointer dereference vulnerability

Microsoft · Exchange Server

The Exchange Collaboration Data Objects (EXCDO) functionality in Microsoft Exchange Server 2000 SP3, 2003 SP1 and SP2, and 2007 allows remote attackers to cause a denial of service (crash) via an Internet Calendar (iCal) file containing multiple X-MICROSOFT-CDO-MODPROPS (MODPROPS) properties in which the second MODPROPS is longer than the first, which triggers a NULL pointer dereference and an unhandled exception.

7.8 CVSS 2.0 High EPSS 45% · top 1.3% CWE-476 · NULL pointer dereference
7.8CVSS 2.0 base score
45%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
26References
16 Jun 2026Last modified by NVD

Description

The Exchange Collaboration Data Objects (EXCDO) functionality in Microsoft Exchange Server 2000 SP3, 2003 SP1 and SP2, and 2007 allows remote attackers to cause a denial of service (crash) via an Internet Calendar (iCal) file containing multiple X-MICROSOFT-CDO-MODPROPS (MODPROPS) properties in which the second MODPROPS is longer than the first, which triggers a NULL pointer dereference and an unhandled exception.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.grok.org.uk/pipermail/full-disclosure/2007-May/063232.html Mailing ListThird Party Advisory
http://secunia.com/advisories/25183 Third Party Advisory
http://www.determina.com/security.research/vulnerabilities/exchange-ical-modprops.html Broken Link
http://www.osvdb.org/34390 Broken Link
http://www.securityfocus.com/archive/1/468047/100/0/threaded Third Party AdvisoryVDB Entry
http://www.securityfocus.com/archive/1/468871/100/200/threaded Third Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/23808 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id?1018015 Third Party AdvisoryVDB Entry
http://www.us-cert.gov/cas/techalerts/TA07-128A.html Third Party AdvisoryUS Government Resource
http://www.vupen.com/english/advisories/2007/1711 Permissions Required
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-026 PatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/33888 Third Party AdvisoryVDB Entry
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1593 Third Party Advisory
http://lists.grok.org.uk/pipermail/full-disclosure/2007-May/063232.html Mailing ListThird Party Advisory
http://secunia.com/advisories/25183 Third Party Advisory
http://www.determina.com/security.research/vulnerabilities/exchange-ical-modprops.html Broken Link
http://www.osvdb.org/34390 Broken Link
http://www.securityfocus.com/archive/1/468047/100/0/threaded Third Party AdvisoryVDB Entry
http://www.securityfocus.com/archive/1/468871/100/200/threaded Third Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/23808 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id?1018015 Third Party AdvisoryVDB Entry
http://www.us-cert.gov/cas/techalerts/TA07-128A.html Third Party AdvisoryUS Government Resource
http://www.vupen.com/english/advisories/2007/1711 Permissions Required
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-026 PatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/33888 Third Party AdvisoryVDB Entry
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1593 Third Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2007-0039), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.