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Vulnerabilities

Microsoft Exchange Server

Ranked by severity, then by exploit likelihood, unless you sort otherwise. Click a CVE ID for its full record.

271CVEs
CVE-2016-0028
Outlook Web Access (OWA) in Microsoft Exchange Server 2013 SP1, Cumulative Update 11, and Cumulative Update 12 and 2016 Gold and Cumulative Update 1 does not properly restrict loading of IMG elements, which makes it easier for remote attackers to track users via a crafted HTML e-mail message, aka "Microsoft Exchange Information Disclosure Vulnerability."
Published 2016-06-16 · Modified
5.5EPSS 0.226
CVE-2017-8535
The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016, Microsoft Exchange Server 2013 and 2016, does not properly scan a specially crafted file leading to denial of service. aka "Microsoft Malware Protection Engine Denial of Service Vulnerability", a different vulnerability than CVE-2017-8536, CVE-2017-8537, CVE-2017-8539, and CVE-2017-8542.
Published 2017-05-26 · Modified
5.51 PoCEPSS 0.168
CVE-2017-8536
The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016, Microsoft Exchange Server 2013 and 2016, does not properly scan a specially crafted file leading to denial of service. aka "Microsoft Malware Protection Engine Denial of Service Vulnerability", a different vulnerability than CVE-2017-8535, CVE-2017-8537, CVE-2017-8539, and CVE-2017-8542.
Published 2017-05-26 · Modified
5.51 PoCEPSS 0.168
CVE-2017-8537
The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016, Microsoft Exchange Server 2013 and 2016, does not properly scan a specially crafted file leading to denial of service. aka "Microsoft Malware Protection Engine Denial of Service Vulnerability", a different vulnerability than CVE-2017-8535, CVE-2017-8536, CVE-2017-8539, and CVE-2017-8542.
Published 2017-05-26 · Modified
5.51 PoCEPSS 0.168
CVE-2018-0941
Microsoft Exchange Server 2016 Cumulative Update 7 and Microsoft Exchange Server 2016 Cumulative Update 8 allow an information disclosure vulnerability due to how data is imported, aka "Microsoft Exchange Information Disclosure Vulnerability". This CVE is unique from CVE-2018-0924.
Published 2018-03-14 · Modified
5.5EPSS 0.125
CVE-2020-17083
Microsoft Exchange Server Remote Code Execution Vulnerability
Published 2020-11-11 · Modified
5.5EPSS 0.120
CVE-2017-8539
The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016, Microsoft Exchange Server 2013 and 2016, does not properly scan a specially crafted file leading to denial of service. aka "Microsoft Malware Protection Engine Denial of Service Vulnerability", a different vulnerability than CVE-2017-8535, CVE-2017-8536, CVE-2017-8537, and CVE-2017-8542.
Published 2017-05-26 · Modified
5.5EPSS 0.060
CVE-2017-8542
The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016, Microsoft Exchange Server 2013 and 2016, does not properly scan a specially crafted file leading to denial of service. aka "Microsoft Malware Protection Engine Denial of Service Vulnerability", a different vulnerability than CVE-2017-8535, CVE-2017-8536, CVE-2017-8537, and CVE-2017-8539.
Published 2017-05-26 · Modified
5.5EPSS 0.060
CVE-2020-0903
A cross-site-scripting (XSS) vulnerability exists when Microsoft Exchange Server does not properly sanitize a specially crafted web request to an affected Exchange server, aka 'Microsoft Exchange Server Spoofing Vulnerability'.
Published 2020-03-12 · Modified
5.4EPSS 0.016
CVE-2019-1137
A cross-site-scripting (XSS) vulnerability exists when Microsoft Exchange Server does not properly sanitize a specially crafted web request to an affected Exchange server, aka 'Microsoft Exchange Server Spoofing Vulnerability'.
Published 2019-07-29 · Modified
5.4EPSS 0.016
CVE-2017-11761
Microsoft Exchange Server 2013 and Microsoft Exchange Server 2016 allow an input sanitization issue with Microsoft Exchange that could potentially result in unintended Information Disclosure, aka "Microsoft Exchange Information Disclosure Vulnerability"
Published 2017-09-13 · Modified
5.3EPSS 0.066
CVE-2022-34692
Microsoft Exchange Server Information Disclosure Vulnerability
Published 2022-08-09 · Modified
5.3EPSS 0.018
CVE-2025-25006
Microsoft Exchange Server Spoofing Vulnerability
Published 2025-08-12 · Analyzed
5.3EPSS 0.009
CVE-2025-25007
Microsoft Exchange Server Spoofing Vulnerability
Published 2025-08-12 · Analyzed
5.3EPSS 0.009
CVE-2025-64667
Microsoft Exchange Server Spoofing Vulnerability
Published 2025-12-09 · Analyzed
5.3EPSS 0.009
CVE-2002-0055
SMTP service in Microsoft Windows 2000, Windows XP Professional, and Exchange 2000 allows remote attackers to cause a denial of service via a command with a malformed data transfer (BDAT) request.
Published 2002-06-25 · Modified
5.0EPSS 0.380
CVE-2001-0146
IIS 5.0 and Microsoft Exchange 2000 allow remote attackers to cause a denial of service (memory allocation error) by repeatedly sending a series of specially formatted URL's.
Published 2001-03-09 · Modified
5.0EPSS 0.371
CVE-2002-1790
The SMTP service in Microsoft Internet Information Services (IIS) 4.0 and 5.0 allows remote attackers to bypass anti-relaying rules and send spam or spoofed messages via encapsulated SMTP addresses, a similar vulnerability to CVE-1999-0682.
Published 2005-06-28 · Modified
5.01 PoCEPSS 0.340
CVE-2001-1319
Microsoft Exchange 5.5 2000 allows remote attackers to cause a denial of service (hang) via exceptional BER encodings for the LDAP filter type field, as demonstrated by the PROTOS LDAPv3 test suite.
Published 2002-05-03 · Modified
5.0EPSS 0.333
CVE-2009-0099
The Electronic Messaging System Microsoft Data Base (EMSMDB32) provider in Microsoft Exchange 2000 Server SP3 and Exchange Server 2003 SP2, as used in Exchange System Attendant, allows remote attackers to cause a denial of service (application outage) via a malformed MAPI command, aka "Literal Processing Vulnerability."
Published 2009-02-10 · Modified
5.0EPSS 0.262
CVE-1999-0682
Microsoft Exchange 5.5 allows a remote attacker to relay email (i.e. spam) using encapsulated SMTP addresses, even if the anti-relaying features are enabled.
Published 2000-01-04 · Modified
5.0EPSS 0.261
CVE-2001-0660
Outlook Web Access (OWA) in Microsoft Exchange 5.5, SP4 and earlier, allows remote attackers to identify valid user email addresses by directly accessing a back-end function that processes the global address list (GAL).
Published 2002-03-09 · Modified
5.0EPSS 0.220
CVE-2010-0025
The SMTP component in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, and Server 2008 Gold, SP2, and R2, and Exchange Server 2000 SP3, does not properly allocate memory for SMTP command replies, which allows remote attackers to read fragments of e-mail messages by sending a series of invalid commands and then sending a STARTTLS command, aka "SMTP Memory Allocation Vulnerability."
Published 2010-04-14 · Modified
5.0EPSS 0.215
CVE-2026-45502
Microsoft Exchange Server Information Disclosure Vulnerability
Published 2026-06-09 · Analyzed
5.0EPSS 0.196
CVE-1999-0945
Buffer overflow in Internet Mail Service (IMS) for Microsoft Exchange 5.5 and 5.0 allows remote attackers to conduct a denial of service via AUTH or AUTHINFO commands.
Published 2001-05-07 · Modified
5.0EPSS 0.195
CVE-2001-0543
Memory leak in NNTP service in Windows NT 4.0 and Windows 2000 allows remote attackers to cause a denial of service (memory exhaustion) via a large number of malformed posts.
Published 2002-03-09 · Modified
5.0EPSS 0.188
CVE-2015-2505
Outlook Web Access (OWA) in Microsoft Exchange Server 2013 Cumulative Update 8 and 9 and SP1 allows remote attackers to obtain sensitive stacktrace information via a crafted request, aka "Exchange Information Disclosure Vulnerability."
Published 2015-09-09 · Modified
5.0EPSS 0.182
CVE-2001-0509
Vulnerabilities in RPC servers in (1) Microsoft Exchange Server 2000 and earlier, (2) Microsoft SQL Server 2000 and earlier, (3) Windows NT 4.0, and (4) Windows 2000 allow remote attackers to cause a denial of service via malformed inputs.
Published 2001-08-29 · Modified
5.0EPSS 0.170
CVE-2002-0368
The Store Service in Microsoft Exchange 2000 allows remote attackers to cause a denial of service (CPU consumption) via a mail message with a malformed RFC message attribute, aka "Malformed Mail Attribute can Cause Exchange 2000 to Exhaust CPU Resources."
Published 2003-04-02 · Modified
5.0EPSS 0.152
CVE-2000-1006
Microsoft Exchange Server 5.5 does not properly handle a MIME header with a blank charset specified, which allows remote attackers to cause a denial of service via a charset="" command, aka the "Malformed MIME Header" vulnerability.
Published 2001-01-22 · Modified
5.0EPSS 0.148
CVE-2000-0524
Microsoft Outlook and Outlook Express allow remote attackers to cause a denial of service by sending email messages with blank fields such as BCC, Reply-To, Return-Path, or From.
Published 2000-07-12 · Modified
5.0EPSS 0.146
CVE-2002-1873
Microsoft Exchange 2000, when used with Microsoft Remote Procedure Call (MSRPC), allows remote attackers to cause a denial of service (crash or memory consumption) via malformed MSRPC calls.
Published 2005-06-28 · Modified
5.0EPSS 0.136
CVE-1999-1043
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 (application error).
Published 2001-09-12 · Modified
5.0EPSS 0.132
CVE-2010-0024
The SMTP component in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, and Server 2008 Gold, SP2, and R2, and Exchange Server 2003 SP2, does not properly parse MX records, which allows remote DNS servers to cause a denial of service (service outage) via a crafted response to a DNS MX record query, aka "SMTP Server MX Record Vulnerability."
Published 2010-04-14 · Modified
5.0EPSS 0.107
CVE-2014-6319
Outlook Web App (OWA) in Microsoft Exchange Server 2007 SP3, 2010 SP3, and 2013 SP1 and Cumulative Update 6 does not properly validate tokens in requests, which allows remote attackers to spoof the origin of e-mail messages via unspecified vectors, aka "Outlook Web App Token Spoofing Vulnerability."
Published 2014-12-11 · Modified
5.0EPSS 0.097
CVE-2015-1631
Microsoft Exchange Server 2013 SP1 and Cumulative Update 7 allows remote attackers to spoof meeting organizers via unspecified vectors, aka "Exchange Forged Meeting Request Spoofing Vulnerability."
Published 2015-03-11 · Modified
5.0EPSS 0.091
CVE-1999-0007
Information from SSL-encrypted sessions via PKCS #1.
Published 1999-09-29 · Modified
5.0EPSS 0.085
CVE-2000-0216
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 system with responses by forging a Read Receipt request that is redirected to a large distribution list.
Published 2000-03-22 · Modified
5.0EPSS 0.051
CVE-2005-0738
Stack consumption vulnerability in Microsoft Exchange Server 2003 SP1 allows users to cause a denial of service (hang) by deleting or moving a folder with deeply nested subfolders, which causes Microsoft Exchange Information Store service (Store.exe) to hang as a result of a large number of recursive calls.
Published 2005-03-13 · Modified
5.0EPSS 0.045
CVE-2001-1099
The default configuration of Norton AntiVirus for Microsoft Exchange 2000 2.x allows remote attackers to identify the recipient's INBOX file path by sending an email with an attachment containing malicious content, which includes the path in the rejection notice.
Published 2002-06-25 · Modified
5.0EPSS 0.032
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