# CVE-2020-0638: Microsoft Update Notification Manager Privilege Escalation Vulnerability

- Exploited (CISA KEV): yes, added 2022-05-23, known ransomware use
- Published: 2020-01-14
- CVSS: 7.8 HIGH (v3.1)
- EPSS: 2.4% (84th percentile)

An elevation of privilege vulnerability exists in the way the Update Notification Manager handles files.To exploit this vulnerability, an attacker would first have to gain execution on the victim system, aka 'Update Notification Manager Elevation of Privilege Vulnerability'.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | Before feed history | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | Before feed history | — | — |
| Fastly | Before feed history | — | — |
| F5 | Before feed history | — | — |
| Akamai | No public source | — | — |
| OWASP CRS | Before feed history | — | — |

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2020-0638 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2020-0638