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CVE-2007-0221

39
FAUCET Score

CVE-2007-0221 describes an integer overflow vulnerability in the IMAP4 support of Microsoft Exchange Server 2000 SP3. This flaw allows unauthenticated remote attackers to trigger a denial of service by sending specially crafted literals within an IMAP command, causing the service to hang. With a CVSS score of 7.8, it is considered highly severe due to its network-based attack vector and complete availability impact. Despite its high FAUCET Risk Score of 98/100, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
2000CPE matchmatch criteria
cpe:2.3:a:microsoft:exchange_server:2000:sp3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
37.24%
Probability of exploitation in next 30 days
EPSS Percentile
98.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.3724 is in the 97th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

labs.idefense.com / intelligence/vulnerabilities/display.php
PatchThird Party Advisory
docs.microsoft.com / en-us/security-updates/securitybulletins/2007/ms07-026
PatchVendor Advisory
secunia.com / advisories/25183
PatchThird Party Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/33890
Third Party AdvisoryVDB Entry
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A2054
Third Party Advisory
osvdb.org / 34392
Broken Link
securityfocus.com / archive/1/468871/100/200/threaded
Third Party AdvisoryVDB Entry
securityfocus.com / bid/23810
Third Party AdvisoryVDB Entry
securitytracker.com / id
PatchThird Party AdvisoryVDB Entry
us-cert.gov / cas/techalerts/TA07-128A.html
Third Party AdvisoryUS Government Resource
vupen.com / english/advisories/2007/1711
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