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    CVE-2007-0221

    Integer overflow in the IMAP (IMAP4) support in Microsoft Exchange Server 2000 SP3 allows remote attackers to cause a denial of service (service hang) via crafted literals in an IMAP command, aka the "IMAP Literal Processing Vulnerability."

    Published:May 8, 2007
    Last Modified:Apr 23, 2026
    EPS:May 8, 2007
    EPSS Score:0.65014
    CVSS Score:7.8

    Affected Products

    Vendor
    Microsoft
    Product
    Exchange Server

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-190 Integer Overflow or Wraparound

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    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://labs.idefense.com/intelligence/vulnerabilities/display.php?id=526
    http://secunia.com/advisories/25183
    http://www.osvdb.org/34392
    http://www.securityfocus.com/archive/1/468871/100/200/threaded
    http://www.securityfocus.com/bid/23810
    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/33890
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A2054
    http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=526
    http://secunia.com/advisories/25183
    http://www.osvdb.org/34392
    http://www.securityfocus.com/archive/1/468871/100/200/threaded
    http://www.securityfocus.com/bid/23810
    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/33890
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A2054

    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