A spoofing vulnerability exists in the way Windows CryptoAPI (Crypt32.dll) validates Elliptic Curve Cryptography (ECC) certificates.An attacker could exploit the vulnerability by using a spoofed code-signing certificate to sign a malicious executable, making it appear the file was from a trusted, legitimate source, aka 'Windows CryptoAPI Spoofing Vulnerability'.
Conclusion & alert: CVE-2020-0601 is rated Critical Active Threat (93.9/100): CVSS High severity, with high exploitation likelihood (EPSS 94.09%, 100th percentile). Core evidence: CISA KEV confirms active exploitation (added 2021-11-03) affecting Microsoft / Windows. a weakness (CWE-295) Unauthenticated remote administrative access may be possible. EPSS rose +1.58% over the last day, indicating growing attacker interest. Mandatory action: The CISA remediation deadline has passed—treat as an emergency patch priority.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
: Microsoft Windows CryptoAPI Spoofing Vulnerability · CISA KEV detail
: 2021-11-03
: 2022-05-03
: Apply updates per vendor instructions.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| 47933 | exploit_db | edb | 2020-01-15 | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2025-11-21 | 92.52% | 94.09% | +1.58% |
| 2 | 2025-11-18 | 94.09% | 92.52% | -1.58% |
| 3 | 2025-10-30 | — | 94.09% | — |
Full EPSS history (27 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 8.1 | 3.1 | HIGH |
|
2.8 | 5.2 | [email protected] |
| 8.1 | 3.1 | HIGH |
|
2.8 | 5.2 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| 5.8 | 2.0 | MEDIUM |
|
8.6 | 4.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2020-0601: 1 source package rows (containerd); 7 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 7, open 0. | https://security.alpinelinux.org/vuln/CVE-2020-0601 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | windows_10_1507 | — | cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:x64:* |
| microsoft | windows_10_1507 | — | cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:x86:* |
| microsoft | windows_10_1607 | — | cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:x64:* |
| microsoft | windows_10_1607 | — | cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:x86:* |
| microsoft | windows_10_1709 | — | cpe:2.3:o:microsoft:windows_10_1709:-:*:*:*:*:*:arm64:* |
| microsoft | windows_10_1709 | — | cpe:2.3:o:microsoft:windows_10_1709:-:*:*:*:*:*:x64:* |
| microsoft | windows_10_1709 | — | cpe:2.3:o:microsoft:windows_10_1709:-:*:*:*:*:*:x86:* |
| microsoft | windows_10_1803 | — | cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:arm64:* |
| microsoft | windows_10_1803 | — | cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:x64:* |
| microsoft | windows_10_1803 | — | cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:x86:* |
| microsoft | windows_10_1809 | — | cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:arm64:* |
| microsoft | windows_10_1809 | — | cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* |
| microsoft | windows_10_1809 | — | cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* |
| microsoft | windows_10_1903 | — | cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:arm64:* |
| microsoft | windows_10_1903 | — | cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:x64:* |
| microsoft | windows_10_1903 | — | cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:x86:* |
| microsoft | windows_10_1909 | — | cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:arm64:* |
| microsoft | windows_10_1909 | — | cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:x64:* |
| microsoft | windows_10_1909 | — | cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:x86:* |
| microsoft | windows_server_1803 | — | cpe:2.3:o:microsoft:windows_server_1803:-:*:*:*:*:*:*:* |
| microsoft | windows_server_1903 | — | cpe:2.3:o:microsoft:windows_server_1903:-:*:*:*:*:*:*:* |
| microsoft | windows_server_1909 | — | cpe:2.3:o:microsoft:windows_server_1909:-:*:*:*:*:*:*:* |
| microsoft | windows_server_2016 | — | cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* |
| microsoft | windows_server_2019 | — | cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* |
| golang | go | >= 1.12, < 1.12.16 | cpe:2.3:a:golang:go:*:*:*:*:*:*:*:* |
| golang | go | >= 1.13, < 1.13.7 | cpe:2.3:a:golang:go:*:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| http://packetstormsecurity.com/files/155960/CurveBall-Microsoft-Windows-CryptoAPI-Spoofing-Proof-Of-Concept.html | Third Party Advisory VDB Entry |
| http://packetstormsecurity.com/files/155961/CurveBall-Microsoft-Windows-CryptoAPI-Spoofing-Proof-Of-Concept.html | Third Party Advisory VDB Entry |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0601 | Patch Vendor Advisory |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0601 | US Government Resource |