How severe is CVE-2020-0796?

CVE-2020-0796 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-0796 being actively exploited?

Yes. CVE-2020-0796 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-02-10, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2020-0796?

CVE-2020-0796 primarily affects Microsoft Windows 10 1903. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-0796?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2020-0796 have an EU (EUVD) identifier?

Yes. CVE-2020-0796 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-2283. It is also flagged as exploited in the EUVD (since 2022-02-10).

When was CVE-2020-0796 published?

CVE-2020-0796 was published on 2020-03-12 and last updated on 2026-10-01.

CVE-2020-0796

CVE-2020-0796 is a critical-severity vulnerability in Microsoft Windows 10 1903 with a CVSS 3.x base score of 10.0. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-02-10). The underlying weakness is classified as CWE-119.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
CVSS v2: 7.5
EPSS exploit prediction: 100% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-02-10)
EU (EUVD) id: EUVD-2020-2283
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-02-10)
Weakness: CWE-119
Affected product: Microsoft Windows 10 1903
Published: 2020-03-12
Last modified: 2026-10-01

Description

A remote code execution vulnerability exists in the way that the Microsoft Server Message Block 3.1.1 (SMBv3) protocol handles certain requests, aka 'Windows SMBv3 Client/Server Remote Code Execution Vulnerability'.

Frequently asked questions

What is CVE-2020-0796?: A remote code execution vulnerability exists in the way that the Microsoft Server Message Block 3.1.1 (SMBv3) protocol handles certain requests, aka 'Windows SMBv3 Client/Server Remote Code Execution Vulnerability'.
How severe is CVE-2020-0796?: CVE-2020-0796 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-0796 being actively exploited?: Yes. CVE-2020-0796 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-02-10, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2020-0796?: CVE-2020-0796 primarily affects Microsoft Windows 10 1903. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-0796?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2020-0796 have an EU (EUVD) identifier?: Yes. CVE-2020-0796 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-2283. It is also flagged as exploited in the EUVD (since 2022-02-10).
When was CVE-2020-0796 published?: CVE-2020-0796 was published on 2020-03-12 and last updated on 2026-10-01.

References

Affected products (8)

cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1903:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_server_1903:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_1909:-:*:*:*:*:*:x64:*

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Browse all CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

92.118.39.145 (ipv4-addr)
213.177.179.12 (ipv4-addr)
45.43.60.133 (ipv4-addr)
223.123.65.54 (ipv4-addr)
217.160.124.58 (ipv4-addr)
158.94.211.246 (ipv4-addr)
185.243.5.110 (ipv4-addr)
92.118.39.120 (ipv4-addr)