Outlook vulnerabilitiesAnd the versions its exploited flaws hit.
Outlook is made by Microsoft. We track 115 published vulnerabilities listed under that exact name, across 37 versions. 5 of them are on the list of flaws known to be exploited, the newest added on 12 August 2025. Microsoft lists newer releases under their own names, such as Outlook Express, so check those pages too.
The most recent Outlook flaw added to the known-exploited list is CVE-2007-0671, on 12 August 2025. We keep watching the known-exploited list.
Is Outlook listed under other names? Yes.
Microsoft also lists Outlook under more specific names, such as Outlook Express and Outlook Rt. Flaws listed only under those names are counted on their own pages, not here. If you run one of these, open its page for its own exploited flaws.
Which versions of Outlook do the exploited flaws hit?
Each exploited flaw lists the versions it affects, as published by the vendor. Find your version, then patch.
- CVE-2007-0671Exploited list, 12 Aug 2025
Microsoft Office Excel Remote Code Execution Vulnerability
200020022003 - CVE-2023-35311Exploited list, 11 Jul 2023
Microsoft Outlook Security Feature Bypass Vulnerability
20132013-sp12016 - CVE-2023-23397Exploited list, 14 Mar 2023
Microsoft Office Outlook Privilege Escalation Vulnerability
2013-sp12016 - CVE-2015-1641Exploited list, 3 Nov 2021
Microsoft Office Memory Corruption Vulnerability
2011 - CVE-2017-11774Exploited list, 3 Nov 2021
Microsoft Office Outlook Security Feature Bypass Vulnerability
2010-sp22013-sp12016
Which Outlook vulnerabilities are being exploited?
5 flaws are on the government list of vulnerabilities known to be exploited. These are the ones criminals are using now, so they go first, whatever their severity score says.
- 8.8Microsoft Office Excel Remote Code Execution Vulnerability
Microsoft Office Excel contains a remote code execution vulnerability that can be exploited when a specially crafted Excel file is opened.
- 8.8Microsoft Outlook Security Feature Bypass Vulnerability
Microsoft Outlook contains a security feature bypass vulnerability that allows an attacker to bypass the Microsoft Outlook Security Notice prompt.
- 9.8Microsoft Office Outlook Privilege Escalation Vulnerability
Microsoft Office Outlook contains a privilege escalation vulnerability that allows for a NTLM Relay attack against another service to authenticate as the user.
- 7.8Microsoft Office Memory Corruption Vulnerability
Microsoft Office contains a memory corruption vulnerability due to failure to properly handle rich text format files in memory.
- 7.8Microsoft Office Outlook Security Feature Bypass Vulnerability
Microsoft Office Outlook contains a security feature bypass vulnerability due to improperly handling objects in memory.
Which Outlook flaws are most likely to be used?
Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- 97%
Microsoft Outlook Elevation of Privilege Vulnerability
- 61%CVE-2006-4868Critical
Stack-based buffer overflow in the Vector Graphics Rendering engine (vgx.dll), as used in Microsoft Outlook and Internet Explorer 6.0 on Windows XP SP2, and possibly other versions, allows remote attackers to execute...
- 60%
Microsoft Outlook 2010 SP2, Outlook 2013 SP1 and RT SP1, and Outlook 2016 allow an attacker to execute arbitrary commands, due to how Microsoft Office handles objects in memory, aka "Microsoft Outlook Security...
- 53%CVE-2001-0538Critical
Microsoft Outlook View ActiveX Control in Microsoft Outlook 2002 and earlier allows remote attackers to execute arbitrary commands via a malicious HTML e-mail message or web page.
- 49%CVE-2004-0200Critical
Buffer overflow in the JPEG (JPG) parsing engine in the Microsoft Graphic Device Interface Plus (GDI+) component, GDIPlus.dll, allows remote attackers to execute arbitrary code via a JPEG image with a small JPEG COM...
- 48%CVE-2004-0121High
Argument injection vulnerability in Microsoft Outlook 2002 does not sufficiently filter parameters of mailto: URLs when using them as arguments when calling OUTLOOK.EXE, which allows remote attackers to use script...
- 46%CVE-2006-0002High
Unspecified vulnerability in Microsoft Outlook 2000 through 2003, Exchange 5.0 Server SP2 and 5.5 SP4, Exchange 2000 SP3, and Office allows remote attackers to execute arbitrary code via an e-mail message with a...
Running Outlook? We'll keep checking.
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1 flaw being exploited affects software Acme tracks
Microsoft Office Excel contains a remote code execution vulnerability that can be exploited when a specially crafted Excel file is opened. This malicious file could be delivered as an email attachment or hosted on a malicious website. An attacker could leverage this vulnerability by creating a specially crafted Excel file, which, when opened, allowing an attacker to execute remote code on the affected system.
- Matched to
- Outlook on Acme's software list
- What to do
- Patch first, then check for signs of use
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
We track 115 published vulnerabilities listed under the name Outlook, across 37 versions. The most recent Outlook flaw added to the known-exploited list is CVE-2007-0671, on 12 August 2025.
5 are on the list of flaws known to be exploited. The most recently added are CVE-2007-0671, CVE-2023-35311 and CVE-2023-23397.
Microsoft also lists Outlook under more specific names, such as Outlook Express and Outlook Rt. Flaws listed only under those names are counted on their own pages, not here. Open the release you run to see its own list.
Each flaw names its own versions, usually as ranges. The newest, CVE-2007-0671, affects 2000, 2002, 2003. The versions for every exploited flaw are listed on this page.
Create a Precursor Intelligence account and track Outlook. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.