How severe is CVE-2020-1350?

CVE-2020-1350 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-2020-1350 being actively exploited?

Yes. CVE-2020-1350 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2020-1350?

CVE-2020-1350 primarily affects Microsoft Windows Server 2008. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-1350?

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-2020-1350 have an EU (EUVD) identifier?

Yes. CVE-2020-1350 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-12226. It is also flagged as exploited in the EUVD (since 2021-11-03).

When was CVE-2020-1350 published?

CVE-2020-1350 was published on 2020-07-14 and last updated on 2026-06-17.

CVE-2020-1350

CVE-2020-1350 is a critical-severity vulnerability in Microsoft Windows Server 2008 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 2021-11-03). The underlying weakness is classified as CWE-20.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
CVSS v2: 10.0
EPSS exploit prediction: 92% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2021-11-03)
EU (EUVD) id: EUVD-2020-12226
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2021-11-03)
Weakness: CWE-20
Affected product: Microsoft Windows Server 2008
Published: 2020-07-14
Last modified: 2026-06-17

Description

A remote code execution vulnerability exists in Windows Domain Name System servers when they fail to properly handle requests, aka 'Windows DNS Server Remote Code Execution Vulnerability'.

Frequently asked questions

What is CVE-2020-1350?: A remote code execution vulnerability exists in Windows Domain Name System servers when they fail to properly handle requests, aka 'Windows DNS Server Remote Code Execution Vulnerability'.
How severe is CVE-2020-1350?: CVE-2020-1350 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-2020-1350 being actively exploited?: Yes. CVE-2020-1350 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2020-1350?: CVE-2020-1350 primarily affects Microsoft Windows Server 2008. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-1350?: 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-2020-1350 have an EU (EUVD) identifier?: Yes. CVE-2020-1350 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-12226. It is also flagged as exploited in the EUVD (since 2021-11-03).
When was CVE-2020-1350 published?: CVE-2020-1350 was published on 2020-07-14 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*

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