# calebstewart/CVE-2021-1675

Pure PowerShell implementation of CVE-2021-1675 Print Spooler Local Privilege Escalation (PrintNightmare)

Repository: https://github.com/calebstewart/CVE-2021-1675
Canonical: https://ross.abutalabs.com/products/calebstewart-cve-2021-1675
Language: PowerShell
License Family: other
Last push: 2021-07-05T08:54:06+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 1889, "days_push": 1885, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1109, forks 223 (observed 2026-08-28T04:03:37.308841+00:00)

## What it is
A pure PowerShell proof-of-concept exploit for CVE-2021-1675 (PrintNightmare), a Windows Print Spooler local privilege escalation vulnerability. It adds a new local administrator user by default or loads a custom DLL payload via the spooler driver path.

## Use cases
- demonstrate the PrintNightmare local privilege escalation on Windows Server
- test whether a Windows host is patched against CVE-2021-1675
- add a local admin user via the Print Spooler vulnerability
- run a custom DLL payload through the spooler exploit
- study a pure PowerShell implementation of a Windows LPE exploit

## When to choose
- you need a dependency-free, native PowerShell PoC for PrintNightmare LPE
- you are doing authorized penetration testing or red teaming on Windows Server 2016/2019
- you want to verify patch status against CVE-2021-1675

## When to avoid
- you need a remote code execution exploit rather than local privilege escalation
- you require a maintained or supported tool - it is a one-off PoC with no license
- you are not authorized to test the target system

## Facets
- artifact type: cli-tool
- maturity: maintenance
- function: security, penetration-testing
- domain: security, windows, penetration-testing
- platform: windows
- tags: exploit, privilege-escalation, printnightmare, cve-2021-1675, proof-of-concept, powershell

## Member repositories
- calebstewart/CVE-2021-1675 (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:37.308841+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:43:34.337471+00:00, confidence not recorded.
  - readme: https://github.com/calebstewart/CVE-2021-1675 (fetched 2026-08-28T04:03:37.308841+00:00, sha 44604bc262af)
- Data as of 2026-08-30T08:39:29.467469+00:00.