ES
Email
Exchange Server
by Microsoft · last CVE Oct 13, 2026
On CISA KEVExploited in the wildRansomware-linked
258
CVEs
20
On KEV
9.8
Max CVSS
3
New 30D
Severity mix
Critical 23High 92Medium 66Low 0
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CVECVSSEPSSPublishedSummary · affected versions
CVE-2000-0216
–
5%
Feb 29
Microsoft email clients in Outlook, Exchange, and Windows Messaging automatically respond to Read Receipt and Delivery Receipt tags, which could allow an attacker to flood a mail…
Affected: All versions, or not specified
CVE-1999-1043
–
13%
Dec 31
Microsoft Exchange Server 5.5 and 5.0 does not properly handle (1) malformed NNTP data, or (2) malformed SMTP data, which allows remote attackers to cause a denial of service…
Affected: 5.0; 5.5
CVE-1999-0993
–
7%
Dec 13
Modifications to ACLs (Access Control Lists) in Microsoft Exchange 5.5 do not take effect until the directory store cache is refreshed
Affected: 5.0; 5.5
CVE-1999-0682
–
26%
Aug 6
Microsoft Exchange 5.5 allows a remote attacker to relay email (i.e
Affected: 5.5; 5.5; 5.5
CVE-1999-0385
–
18%
Dec 1
The LDAP bind function in Exchange 5.5 has a buffer overflow that allows a remote attacker to conduct a denial of service or execute commands
Affected: 5.5
CVE-1999-1322
–
1%
Nov 12
The installation of 1ArcServe Backup and Inoculan AV client modules for Exchange create a log file, exchverify.log, which contains usernames and passwords in plaintext
Affected: All versions, or not specified
CVE-1999-0007
–
8%
Jun 26
Information from SSL-encrypted sessions via PKCS #1
Affected: 5.5
CVE-1999-0284
–
12%
Jan 1
Denial of service to NT mail servers including Ipswitch, Mdaemon, and Exchange through a buffer overflow in the SMTP HELO command
Affected: 4.0; 5.0
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