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    CVE-2007-0039

    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.

    Published:May 8, 2007
    Last Modified:Apr 23, 2026
    EPS:May 8, 2007
    EPSS Score:0.39595
    CVSS Score:7.8

    Affected Products

    Vendor
    Microsoft
    Product
    Exchange Server

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-476 NULL Pointer Dereference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-62911 (CVSS 8) — Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate …
    CVE-2026-65813 (CVSS 6.5) — Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privi…
    CVE-2026-62915 (CVSS 6.5) — Missing authorization in Microsoft Exchange Server allows an authorized attacker to bypass a security feature …
    CVE-2026-62914 (CVSS 7.3) — Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Ser…
    CVE-2026-62913 (CVSS 8.8) — Heap-based buffer overflow in Microsoft Exchange Server allows an authorized attacker to execute code over a n…
    CVE-2026-62912 (CVSS 6.5) — Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to deny service o…
    CVE-2026-62910 (CVSS 7.2) — Improper control of resource identifiers ('resource injection') in Microsoft Exchange Server allows an authori…
    CVE-2026-47631 (CVSS 8.1) — Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Ser…
    CVE-2026-45504 (CVSS 8.8) — Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privi…
    CVE-2026-45503 (CVSS 8.1) — Improper authorization in Microsoft Exchange Server allows an authorized attacker to disclose information over…

    References

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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High