Vulnerability record

CVE-2017-0199

Microsoft Office and WordPad Remote Code Execution Vulnerability

HighExploitation confirmedCISA KEV Used by ransomware

What should I do?

This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run Office and WordPad, fix it now.

CISA required action: Apply updates per vendor instructions.

US federal civilian agencies must remediate by May 3, 2022.

Patch status

Official fix available since Sep 30, 2026

Apply the vendor's update to every affected system. Check the fixed-in versions below where known.

Basis: NVD patch reference

Patch or advisory on portal.msrc.microsoft.com (opens in a new tab)

Description

Microsoft Office 2007 SP3, Microsoft Office 2010 SP2, Microsoft Office 2013 SP1, Microsoft Office 2016, Microsoft Windows Vista SP2, Windows Server 2008 SP2, Windows 7 SP1, Windows 8.1 allow remote attackers to execute arbitrary code via a crafted document, aka "Microsoft Office/WordPad Remote Code Execution Vulnerability w/Windows API."

Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.

Affected products

Products affected by this vulnerability, with versions and the source of each entry
Product	Vendor	Affected versions	Source
Office	Microsoft	2007; 2010; 2013; 2016	NVD
Office and WordPad	Microsoft	—	KEV

Sources: NVD = NIST National Vulnerability Database; KEV = CISA Known Exploited Vulnerabilities catalog.

Intelligence timeline

Developments from the last 30 days, newest first.

CVSS scoredUpdateKEVSep 30, 2026
CVE-2017-0199 scored CVSS 7.8: Microsoft Office and WordPad, Microsoft Office and WordPad Remote Code Execution Vulnerability
CISA lists this as exploited in the wild and known to be used in ransomware campaigns. Unpatched Office and WordPad systems are exposed to active attacks now.
Basis: NIST National Vulnerability Database
Patch releasedUpdateKEVSep 30, 2026
Patch released for CVE-2017-0199: Microsoft Office and WordPad, Microsoft Office and WordPad Remote Code Execution Vulnerability
An official fix is now available for Microsoft Office and WordPad. This vulnerability is being exploited, so apply it promptly.
Basis: NVD patch reference

1 earlier event is available with a subscription. See plans.

Coverage

We have not published a story about this vulnerability yet.

References

nvd.nist.gov https://nvd.nist.gov/vuln/detail/CVE-2017-0199
rewtin.blogspot.nl http://rewtin.blogspot.nl/2017/04/cve-2017-0199-practical-exploitation-poc.html
securityfocus.com http://www.securityfocus.com/bid/97498
securitytracker.com http://www.securitytracker.com/id/1038224
blog.nviso.be https://blog.nviso.be/2017/04/12/analysis-of-a-cve-2017-0199-malicious-rtf-document/
ics-cert.us-cert.gov https://ics-cert.us-cert.gov/advisories/ICSMA-18-058-02
portal.msrc.microsoft.com https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0199
exploit-db.com https://www.exploit-db.com/exploits/41894/
exploit-db.com https://www.exploit-db.com/exploits/41934/
exploit-db.com https://www.exploit-db.com/exploits/42995/
fireeye.com https://www.fireeye.com/blog/threat-research/2017/04/cve-2017-0199_useda.html
mdsec.co.uk https://www.mdsec.co.uk/2017/04/exploiting-cve-2017-0199-hta-handler-vulnerability/
cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-0199