CVE-2021-1675

HIGHNVD 7.89.0▲Trending — 4 sources updated this weekExploited in the wild

7.8

Windows Print Spooler Remote Code Execution Vulnerability

CVSS v3: 7.8
EG Score: 9.0(medium)
EPSS: 100.0%
KEV: ⚠ Exploited

Published

June 8, 2021

Last Modified

October 30, 2025

Advisory Details (5)

Auto-updated Jun 3, 2026

Patch available. Sources: microsoft, cert.

cert

VU#383432 - Microsoft Windows Print Spooler allows for RCE via AddPrinterDriverEx()

https://www.kb.cert.org/vuls/id/383432

microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1675

generic

Packet Storm

http://packetstormsecurity.com/files/167261/Print-Spooler-Remote-DLL-Injection.html

generic

Packet Storm

http://packetstormsecurity.com/files/163351/PrintNightmare-Windows-Spooler-Service-Remote-Code-Execution.html

generic

Packet Storm

http://packetstormsecurity.com/files/163349/Microsoft-PrintNightmare-Proof-Of-Concept.html

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-269Improper Privilege Management

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Microsoft MSRCCVE-2021-16752021-06-08
Windows Print Spooler Remote Code Execution Vulnerability

Data Freshness Timeline

(refreshed 20× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-05 18:12 UTCEG score recompute
2026-06-05 18:12 UTCVendor advisory
2026-06-05 18:12 UTCGHSA enrichment
2026-06-05 14:32 UTCEG score recompute
2026-06-05 14:32 UTCVendor advisory
2026-06-05 14:32 UTCGHSA enrichment
2026-06-05 10:51 UTCEG score recompute
2026-06-05 10:51 UTCVendor advisory
2026-06-05 10:51 UTCGHSA enrichment
2026-06-05 07:11 UTCEG score recompute
2026-06-05 07:11 UTCVendor advisory
2026-06-05 07:10 UTCGHSA enrichment
2026-06-05 03:31 UTCEG score recompute
2026-06-05 03:31 UTCVendor advisory
2026-06-05 03:31 UTCGHSA enrichment
2026-06-04 23:51 UTCEG score recompute
2026-06-04 23:51 UTCVendor advisory
2026-06-04 23:51 UTCGHSA enrichment
2026-06-04 20:11 UTCEG score recompute
2026-06-04 20:11 UTCVendor advisory

Publicly available exploits

(10 references)

Working exploit code is in the public domain (10 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoCly4k/PrintNightmare
First seen Sep 26, 2021
Python implementation for PrintNightmare (CVE-2021-1675 / CVE-2021-34527)
Open source ↗
GitHub PoCmstxq17/CVE-2021-1675_RDL_LPE
First seen Sep 1, 2021
PrintNightMare LPE提权漏洞的CS 反射加载插件。开箱即用、通过内存加载、混淆加载的驱动名称来ByPass Defender/EDR。
Open source ↗
GitHub PoCJumpsecLabs/PrintNightmare
First seen Jul 7, 2021
Information on the Windows Spooler vulnerability - CVE-2021-1675; CVE 2021 34527
Open source ↗
GitHub PoCsailay1996/PrintNightmare-LPE
First seen Jul 5, 2021
CVE-2021-1675 (PrintNightmare)
Open source ↗
GitHub PoCcalebstewart/CVE-2021-1675
First seen Jul 1, 2021
Pure PowerShell implementation of CVE-2021-1675 Print Spooler Local Privilege Escalation (PrintNightmare)
Open source ↗
GitHub PoChlldz/CVE-2021-1675-LPE
First seen Jul 1, 2021
Local Privilege Escalation Edition for CVE-2021-1675/CVE-2021-34527
Open source ↗
GitHub PoCevilashz/CVE-2021-1675-LPE-EXP
First seen Jul 1, 2021
PrintNightmare , Local Privilege Escalation of CVE-2021-1675 or CVE-2021-34527
Open source ↗
GitHub PoCcybersecurityworks553/CVE-2021-1675_PrintNightMare
First seen Jul 1, 2021
Open source ↗
GitHub PoCLaresLLC/CVE-2021-1675
First seen Jun 30, 2021
CVE-2021-1675 Detection Info
Open source ↗
GitHub PoCcube0x0/CVE-2021-1675
First seen Jun 29, 2021
C# and Impacket implementation of PrintNightmare CVE-2021-1675/CVE-2021-34527
Open source ↗

Frequently asked(6)

What is CVE-2021-1675?

CVE-2021-1675 is a high vulnerability published on June 8, 2021. Windows Print Spooler Remote Code Execution Vulnerability

When was CVE-2021-1675 disclosed?

CVE-2021-1675 was first published in the National Vulnerability Database on June 8, 2021, with the most recent update on October 30, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-1675 actively exploited?

Yes. CISA added CVE-2021-1675 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Microsoft Windows. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.

What is the CVSS score of CVE-2021-1675?

CVE-2021-1675 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.

Which products are affected by CVE-2021-1675?

CVE-2021-1675 affects Microsoft Windows. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.

How do I remediate CVE-2021-1675?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-1675, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-1675

Explore →

Is Your Infrastructure Affected by CVE-2021-1675?

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CVE-2021-1675

Published

Last Modified

Advisory Details (5)

VU#383432 - Microsoft Windows Print Spooler allows for RCE via AddPrinterDriverEx()

Security Update Guide - Microsoft Security Response Center

Packet Storm

Packet Storm

Packet Storm

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

Frequently asked(6)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-1675?

Same vendor

Same CWE

CVE-2021-1675

📅 Published

🔄 Last Modified

📋 Advisory Details (5)

VU#383432 - Microsoft Windows Print Spooler allows for RCE via AddPrinterDriverEx()

Security Update Guide - Microsoft Security Response Center

Packet Storm

Packet Storm

Packet Storm

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(6)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-1675?

🔗 Related CVEs(same vendor + same CWE)

Same vendor

Same CWE

Published

Last Modified

Advisory Details (5)

Frequently asked(6)

Related CVEs(same vendor + same CWE)