CISA-confirmed known exploited vulnerability

CVE-2020-1350

Microsoft Windows DNS Server Remote Code Execution Vulnerability

Microsoft · Windows

Vulnerability details

Microsoft Windows DNS Servers fail to properly handle requests, allowing an attacker to perform remote code execution in the context of the Local System Account. The vulnerability is also known under the moniker of SIGRed.

Added to CISA KEV: 2021-11-03

Ransomware campaign use: Unknown

CISA due date: 2022-05-03

Defensive guidance from CISA

Apply updates per vendor instructions.

This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.

Source catalog date: 2026-11-06T19:44:45.1797Z · Last retrieved: 2026-11-06 21:02:26 UTC

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