# Outlook vulnerabilities > 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. Canonical page: https://www.precursorintelligence.com/product/microsoft/outlook ## At a glance - **Made by:** [Microsoft](https://www.precursorintelligence.com/vendors/microsoft) - **Published vulnerabilities:** 115 - **Known to be exploited:** 5 (listed under the name Outlook) - **Versions tracked:** 37 - **Most recently added to the known-exploited list:** [CVE-2007-0671](https://www.precursorintelligence.com/what-is/cve-2007-0671), 12 August 2025. We keep watching the list. ## Is Outlook listed under other names? 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. - [Outlook Express](https://www.precursorintelligence.com/product/microsoft/outlook_express): 45 published vulnerabilities - [Outlook Rt](https://www.precursorintelligence.com/product/microsoft/outlook_rt): 6 published vulnerabilities - [Outlook Web Access](https://www.precursorintelligence.com/product/microsoft/outlook_web_access): 5 published vulnerabilities - [Outlook 2016](https://www.precursorintelligence.com/product/microsoft/outlook_2016): 1 published vulnerability - [Outlook Connector](https://www.precursorintelligence.com/product/microsoft/outlook_connector): 1 published vulnerability - [Outlook Express Book Control](https://www.precursorintelligence.com/product/microsoft/outlook_express_book_control): 1 published vulnerability ## Which versions of Outlook do the exploited flaws hit? Each exploited flaw lists the versions it affects, as published. - [CVE-2007-0671](https://www.precursorintelligence.com/what-is/cve-2007-0671) (Microsoft Office Excel Remote Code Execution Vulnerability): 2000, 2002, 2003 - [CVE-2023-35311](https://www.precursorintelligence.com/what-is/cve-2023-35311) (Microsoft Outlook Security Feature Bypass Vulnerability): 2013, 2013-sp1, 2016 - [CVE-2023-23397](https://www.precursorintelligence.com/what-is/cve-2023-23397) (Microsoft Office Outlook Privilege Escalation Vulnerability): 2013-sp1, 2016 - [CVE-2015-1641](https://www.precursorintelligence.com/what-is/cve-2015-1641) (Microsoft Office Memory Corruption Vulnerability): 2011 - [CVE-2017-11774](https://www.precursorintelligence.com/what-is/cve-2017-11774) (Microsoft Office Outlook Security Feature Bypass Vulnerability): 2010-sp2, 2013-sp1, 2016 ## Which Outlook vulnerabilities are being exploited? 5 flaws are on the government list of vulnerabilities known to be exploited, newest first: - [CVE-2007-0671](https://www.precursorintelligence.com/what-is/cve-2007-0671): Microsoft Office Excel Remote Code Execution Vulnerability. High, CVSS 8.8, chance of use in 30 days 43%, known exploited since 12 August 2025. - [CVE-2023-35311](https://www.precursorintelligence.com/what-is/cve-2023-35311): Microsoft Outlook Security Feature Bypass Vulnerability. High, CVSS 8.8, chance of use in 30 days 16%, known exploited since 11 July 2023. - [CVE-2023-23397](https://www.precursorintelligence.com/what-is/cve-2023-23397): Microsoft Office Outlook Privilege Escalation Vulnerability. Critical, CVSS 9.8, chance of use in 30 days 97%, known exploited since 14 March 2023. - [CVE-2015-1641](https://www.precursorintelligence.com/what-is/cve-2015-1641): Microsoft Office Memory Corruption Vulnerability. High, CVSS 7.8, chance of use in 30 days 97%, known exploited since 3 November 2021. - [CVE-2017-11774](https://www.precursorintelligence.com/what-is/cve-2017-11774): Microsoft Office Outlook Security Feature Bypass Vulnerability. High, CVSS 7.8, chance of use in 30 days 60%, known exploited since 3 November 2021. ## 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): - [CVE-2023-23397](https://www.precursorintelligence.com/what-is/cve-2023-23397): 97%, Critical (CVSS 9.8), known exploited - [CVE-2006-4868](https://www.precursorintelligence.com/what-is/cve-2006-4868): 61%, Critical (CVSS 9.3) - [CVE-2017-11774](https://www.precursorintelligence.com/what-is/cve-2017-11774): 60%, High (CVSS 7.8), known exploited - [CVE-2001-0538](https://www.precursorintelligence.com/what-is/cve-2001-0538): 53%, Critical (CVSS 10.0) - [CVE-2004-0200](https://www.precursorintelligence.com/what-is/cve-2004-0200): 49%, Critical (CVSS 9.3) - [CVE-2004-0121](https://www.precursorintelligence.com/what-is/cve-2004-0121): 48%, High (CVSS 7.5) - [CVE-2006-0002](https://www.precursorintelligence.com/what-is/cve-2006-0002): 46%, High (CVSS 7.5) ## Questions ### How many vulnerabilities does Outlook have? 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. ### Which Outlook vulnerabilities are being exploited? 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. ### Why are newer Outlook flaws missing from this page? 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. ### Which versions of Outlook do the exploited flaws affect? 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. ### How do I get alerts for Outlook? 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. ## Running Outlook? Precursor Intelligence keeps checking for you: - **Tell us what you run.** Pick your software from a list, or let us work it out from your website. - **We match it to every flaw.** Over 400,000 published flaws, checked against your list. - **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it. - **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools. Start free (no card, nothing to install): https://www.precursorintelligence.com/register Book a demo: https://www.precursorintelligence.com/contact