Exploited vulnerability · CISA KEV

Is CVE-2020-0638 exploited? Yes: in CISA KEV since 23 May 2022

Gociux · Microsoft Update Notification Manager · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2020-0638, Microsoft Update Notification Manager Privilege Escalation Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 23 May 2022, 860 days after it was published. It is known to be used in ransomware campaigns. It affects Microsoft Update Notification Manager. If you run it, CISA's required action is: Apply updates per vendor instructions.

What it is

Microsoft Update Notification Manager contains an unspecified vulnerability that allows for privilege escalation.

What to do

1. Check whether you run it. Look for Update Notification Manager 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 14 Jan 2020.
4. Get told next time. Email alerts when CISA adds a CVE for Microsoft.

References

• nvd.nist.gov/vuln/detail/CVE-2020-0638

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 May 2022 · Microsoft scorecard · act-now radar.