CVE Record
[ CRITICAL ]CVE-2020-0646
Microsoft .NET Framework Remote Code Execution Vulnerability
Microsoft .NET Framework contains an improper input validation vulnerability that allows for remote code execution.
- Vendor
- Microsoft
- Product
- .NET Framework
- CVSS
- 9.8
- EPSS (exploit probability)
- 99.2%
- Status
- kev
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2020-0646 being exploited?
Yes. CISA added CVE-2020-0646 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 99.2% (scored October 14, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-10-19. Full cross-catalog view: /kev-comparison
What to do
CISA required actionApply updates per vendor instructions.
US federal civilian agencies must remediate by (181 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other Microsoft .NET Framework CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2024-29059 Microsoft .NET Framework Information Disclosure Vulnerability | [ HIGH ] | 7.5 | 98.6% | |
| CVE-2017-8759 Microsoft .NET Framework Remote Code Execution Vulnerability | [ HIGH ] | 7.8 | 88.7% |