{"uuid": "ab4438eb-e2df-4b77-bf10-712a3eaa0843", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-1675", "type": "seen", "source": "https://t.me/hacking_Attack/43503", "content": "Hacking Articles|Raj Chandel's Blog\nWindows Privilege Escalation: PrintNightmare\n\nIntroductionPrint Spooler has been on researcher\u2019s radar ever since Stuxnet worm used print spooler\u2019s privilege escalation vulnerability to spread through the network in nuclear enrichment centrifuges of Iran and infected more than 45000 networks. PrintNightmare is the common name given to a Remote Code Execution vulnerability in the Print Spooler service (spoolsv.exe) in Microsoft Windows Operating Systems. The vulnerability was assigned CVE-2021-34527. Initially, it was thought of as a Local Privilege Escalation (LPE) and assigned CVE-2021-1675. Immediate patches for the LPE were released in June 2021 and was marked low severity. About 2 weeks later, Microsoft changed the low severity status of LPE to severe as it was found that patches were bypassed and Remote Code Execution achieved CVE-2021-34527 assigned. There was a controversy after a misunderstanding between the authors and Microsoft where the RCE exploit got released on GitHub before the patches, making it a 0-day vulnerability. However, it was immediately rolled back. In this article, we will be focusing on Privilege Escalation using this Print Spooler vulnerability. The traction it got in 2021 made it vulnerability of the year.Related CVEs: Remote Code ExecutionSeverity HighBase CVSS Score9.3Versions AffectedWindows_10:20h2, Windows_10:21h1, Windows_10:1607,CVE-2021-1675Local Privilege EscalationSeverity HighBase CVSS Score9.3Versions AffectedWindows_10:20h2, Windows_10:21h1, Windows_10:1607,Table of Content\u00b7 Print Spooler Basics\u00b7 Vulnerability Summary\u00b7 Vulnerability Flow\u00b7 Machine IPs\u00b7 Method 1 - PrintNightmare RCE using Python\u00b7 Method 2 - PrintNightmare LPE using Powershell\u00b7 Method 3 - Printnightmare LPE using Mimikatz\u00b7 Patch Status\u00b7 ConclusionPrint spooler is the primary printing process interface. It is a built-in EXE file that is loaded at system startup itself. The workflow of a printing process is as follows:___________________________ \n@hacking_Attack\n@Hacking_Video", "creation_timestamp": "2026-09-01T20:01:54.211921Z"}