Exploited vulnerability · CISA KEV

Is CVE-2017-0199 exploited? Yes: in CISA KEV since 3 Nov 2021

Gociux · Microsoft Office and WordPad · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2017-0199, Microsoft Office and WordPad Remote Code Execution Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, 1666 days after it was published. It is known to be used in ransomware campaigns. It affects Microsoft Office and WordPad. If you run it, CISA's required action is: Apply updates per vendor instructions.

What it is

Microsoft Office and WordPad contain an unspecified vulnerability due to the way the applications parse specially crafted files. Successful exploitation allows for remote code execution.

What to do

1. Check whether you run it. Look for Office and WordPad in your asset inventory, including appliances and cloud images. Stack check lists every exploited Microsoft CVE at once.
2. Apply the fix. Apply updates per vendor instructions.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 12 Apr 2017.
4. Get told next time. Email alerts when CISA adds a CVE for Microsoft.

References

• nvd.nist.gov/vuln/detail/CVE-2017-0199

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in November 2021 · Microsoft scorecard · act-now radar.