NVD / CVE Program· CNA microsoft

CVE-2020-0601: A spoofing vulnerability exists in the way Windows CryptoAPI (Crypt32.dll) validates Elliptic Curve Cryptography (ECC) certificates.An…

HighCVSS 8.1 · v3.1KEVWeaponized Fix available

Noroxi assessment

Priority: Now (action score 89/100)

CISA has confirmed exploitation in the wild (Nov 3, 2021). Remediation deadline for US federal agencies: May 3, 2022.
Probability of exploitation in the next 30 days: 89% (FIRST EPSS); higher than 99.7% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
Fixed version: containerd (Alpine:v3.11) 1.3.3-r0; stdlib (Go) 1.13.7, 1.12.16.

Patch today or shut off access. Upgrade to containerd (Alpine:v3.11) 1.3.3-r0; stdlib (Go) 1.13.7, 1.12.16 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

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'.

Published: Jan 14, 2020
Updated: Jun 16, 2026
EPSS: 89.0% · 99th percentile
CWE: CWE-295

Report tools

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Action score

Now

Patch today or shut off access.

CVSS: 32 / 40 · 8.1 / 10
CISA KEV: 30 / 30 · Listed
EPSS: 27 / 30 · 89.0%

CISA SSVC decision

Exploitation: active
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Nov 3, 2021. That signals real attacks, not theory.

Remediation deadline for US federal agencies: May 3, 2022.

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In CISA KEV: exploitation in the wild confirmed
Weaponized exploit exists
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
microsoft	windows 10 1507	cpe:2.3:o:microsoft:windows_10_1507
microsoft	windows 10 1607	cpe:2.3:o:microsoft:windows_10_1607
microsoft	windows 10 1709	cpe:2.3:o:microsoft:windows_10_1709
microsoft	windows 10 1803	cpe:2.3:o:microsoft:windows_10_1803
microsoft	windows 10 1809	cpe:2.3:o:microsoft:windows_10_1809
microsoft	windows 10 1903	cpe:2.3:o:microsoft:windows_10_1903
microsoft	windows 10 1909	cpe:2.3:o:microsoft:windows_10_1909
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

and 2 more

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Versions reported by the vendor

Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.

Microsoft Windows
- 10 Version 1803 for 32-bit Systems, 10 Version 1803 for x64-based Systems, 10 Version 1803 for ARM64-based Systems, 10 Version 1809 for 32-bit Systems, 10 Version 1809 for x64-based Systems, 10 Version 1809 for ARM64-based Systems, 10 Version 1709 for 32-bit Systems, 10 Version 1709 for x64-based Systems, 10 Version 1709 for ARM64-based Systems, 10 for 32-bit Systems, 10 for x64-based Systems, 10 Version 1607 for 32-bit Systems … (+1)affected
Microsoft Windows 10 Version 1903 for 32-bit Systems
- unspecifiedaffected
Microsoft Windows 10 Version 1903 for ARM64-based Systems
- unspecifiedaffected
Microsoft Windows 10 Version 1903 for x64-based Systems
- unspecifiedaffected
Microsoft Windows 10 Version 1909 for 32-bit Systems
- unspecifiedaffected
Microsoft Windows 10 Version 1909 for ARM64-based Systems
- unspecifiedaffected
Microsoft Windows 10 Version 1909 for x64-based Systems
- unspecifiedaffected
Microsoft Windows Server
- version 1803 (Core Installation), 2019, 2019 (Core installation), 2016, 2016 (Core installation)affected
Microsoft Windows Server, version 1903 (Server Core installation)
- unspecifiedaffected
Microsoft Windows Server, version 1909 (Server Core installation)
- unspecifiedaffected

Affected versions · NVD (5)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

microsoft windows server 1803all versions
microsoft windows server 1903all versions
microsoft windows server 1909all versions
microsoft windows server 2016all versions
microsoft windows server 2019all versions

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Alpine:v3.11	containerd	before 1.3.3-r0	1.3.3-r0
Go	stdlib	from 1.13.0-0 · before 1.13.7	1.13.7
Go	stdlib	before 1.12.16	1.12.16

Same product

microsoft: all records

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Published before and after this one in the same product

← EarlierCVE-2019-1405Nov 12, 2019 · An elevation of privilege vulnerability exists when the Windows Universal Plug and Play (UPnP) service improperly allows COM object…KEV
70This week
← EarlierCVE-2019-1458Dec 10, 2019 · An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k…KEV
83Now
Later →CVE-2020-0683Feb 11, 2020 · An elevation of privilege vulnerability exists in the Windows Installer when MSI packages process symbolic links, aka 'Windows Installer…KEV
63This week

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
alpine:containerd	1.3.3-r0 · Alpine:v3.11	Package registry (OSV)
Go:stdlib	1.12.16	Package registry (OSV)
Go:stdlib	1.13.7	Package registry (OSV)

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

Exploit-DB entry ×1
Proof-of-concept repository on GitHub ×35

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Proof-of-concept repository on GitHub	35 repositories	2020-01-14 → 2024-05-16
Exploit-DB entry	local	2020-01-15

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

First PoCJan 14, 2020-1 d
PublishedJan 14, 2020
CISA KEVNov 3, 2021+658 d
TodayNov 14, 2026+2495 d

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
A user must open a link or visit a page.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: none

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: Required
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: None

Weakness class (CWE)

CWE-295 · Improper Certificate Validation

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

nvd-primary

Root cause

A certificate validation error is silently swallowed instead of terminating the connection. Often, code added for a test environment makes its way into production.

The bug in code

The whole CWE-295 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

kotlin

1override fun checkServerTrusted(chain: Array<X509Certificate>, type: String) {
2  // Left empty for the test environment
3}

Fixed

kotlin

1val client = OkHttpClient.Builder()
2  .certificatePinner(
3    CertificatePinner.Builder()
4      .add("api.sirius.example", "sha256/…")
5      .build()
6  ).build()