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Vulnerability record · CVE-2017-8571 · published 1 August 2017

CVE-2017-8571: Microsoft outlook improper input validation vulnerability

Microsoft · Outlook

Microsoft Outlook 2007 SP3, Outlook 2010 SP2, Outlook 2013 SP1, Outlook 2013 RT SP1, and Outlook 2016 as packaged in Microsoft Office allows a security feature bypass vulnerability due to the way that it handles input, aka "Microsoft Office Outlook Security Feature Bypass Vulnerability".

7.8 CVSS 3.0 High EPSS 5.8% · top 7.2% CWE-20 · Improper input validation
7.8CVSS 3.0 base score, v2 6.8
5.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

Microsoft Outlook 2007 SP3, Outlook 2010 SP2, Outlook 2013 SP1, Outlook 2013 RT SP1, and Outlook 2016 as packaged in Microsoft Office allows a security feature bypass vulnerability due to the way that it handles input, aka "Microsoft Office Outlook Security Feature Bypass Vulnerability".

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/99452 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039012 Third Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8571 PatchVendor Advisory
http://www.securityfocus.com/bid/99452 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039012 Third Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8571 PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-23397Microsoft Outlook improper input validation privilege escalationCVE-2023-23397 is a critical elevation of privilege flaw in Microsoft Outlook caused by improper input validation and an authentication bypass by cap…KEVEPSS 97%analysed8.8CVE-2023-35311Microsoft Outlook security feature bypass via TOCTOU race conditionCVE-2023-35311 is a security feature bypass in Microsoft Outlook caused by a time-of-check time-of-use (TOCTOU) race condition (CWE-367). It affects …KEVEPSS 16%analysed8.8CVE-2007-0671Microsoft Excel remote code execution via malformed fileCVE-2007-0671 is an unspecified vulnerability in Microsoft Excel 2000, XP, 2003, and 2004 for Mac, and possibly other Office products, that allows re…KEVEPSS 43%analysed7.8CVE-2017-11774Microsoft Outlook memory handling flaw allows arbitrary command executionMicrosoft Outlook 2010 SP2, 2013 SP1/RT SP1 and 2016 mishandle objects in memory, letting an attacker bypass Outlook security features and execute ar…KEVEPSS 60%analysed7.8CVE-2015-1641Microsoft Office Word RTF out-of-bounds write memory corruptionMicrosoft Word and related Office components (Word 2007/2010/2013, Word for Mac 2011, Office Compatibility Pack, Word Automation Services, Office Web…KEVEPSS 97%analysed10.0CVE-2001-0538Microsoft Outlook View ActiveX Control allows remote command executionThe Outlook View ActiveX Control in Microsoft Outlook 2002 and earlier fails to properly restrict how it is invoked, so a malicious HTML e-mail or we…EPSS 53%analysed9.3CVE-2013-3870Microsoft outlook vulnerabilityDouble free vulnerability in Microsoft Outlook 2007 SP3 and 2010 SP1 and SP2 allows remote attackers to execute arbitrary code by including many nest…EPSS 19%9.3CVE-2010-2728Microsoft outlook memory buffer overflow vulnerabilityHeap-based buffer overflow in Microsoft Outlook 2002 SP3, 2003 SP3, and 2007 SP2, when Online Mode for an Exchange Server is enabled, allows remote a…EPSS 17%

Source: NIST National Vulnerability Database (record CVE-2017-8571), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.