CVE Tools
Track your stack

CVE-2021-1675

Exploited in the wild. In CISA KEV since 2021‑11‑03. Fixed versions are out.

CVSS 3.17.8HighEPSS percentile99th85% chance in 30 daysCISA KEVListedsince 2021-11-03, due 2021-11-17
Public exploit: 3 sourcesFix5 products7 fixed builds listed below

Published Updated Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Microsoft Windows 10 Version 1809Affected: ≥ 10.0.0, < 10.0.17763.1999Upgrade to: 10.0.17763.1999Affected: ≥ 10.0.0, < 10.0.18363.1621Upgrade to: 10.0.18363.1621Affected: ≥ 10.0.0, < 10.0.19043.1052Upgrade to: 10.0.19043.1052Affected: ≥ 10.0.0, < 10.0.19041.1052Upgrade to: 10.0.19041.1052 + 3 more branchesStated by: CVE record
  • Microsoft Windows Server 2019Affected: ≥ 10.0.0, < 10.0.17763.1999Upgrade to: 10.0.17763.1999Stated by: CVE record
  • Microsoft Windows Server version 2004Affected: ≥ 10.0.0, < 10.0.19041.1052Upgrade to: 10.0.19041.1052Affected: ≥ 10.0.0, < 10.0.19042.1052Upgrade to: 10.0.19042.1052Stated by: CVE record
  • Microsoft Windows Server 2016Affected: ≥ 10.0.0, < 10.0.14393.4467Upgrade to: 10.0.14393.4467Stated by: CVE record
  • Microsoft Windows 7Affected: ≥ 6.1.0, < 6.1.7601.25632Upgrade to: 6.1.7601.25632Stated by: CVE record

Versions as the sources state them. 5 more products have version data. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

Coverage timeline

0 publishers

  1. Added to CISA KEV catalog

    ·CISA KEV

Sourced from public security reporting — each date is when it was published, not when it happened. 1 further article named this CVE in wider roundups without reporting it as a distinct event.

What it is

From the CVE record

Windows Print Spooler Remote Code Execution Vulnerability

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS99th
Public exploit
CISA KEV
CISA KEV

Listed as exploited in the wild since 2021-11-03.

US federal agencies must remediate by 2021-11-17.

Known use in ransomware campaigns.

Apply updates per vendor instructions.
Public exploits

3 sources with a proof of concept or module.

Exploit links, PoCs and Metasploit modules after sign-in
EPSS

85% chance of exploitation activity in the next 30 days, which ranks it in the 99th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

The patch came 127 days before any public exploit.

  1. Patch availablerecord updated
  2. OpenVAS check added
  3. EPSS band changecritical → high
  4. Public exploit / PoCsource: packetstorm
  5. Patch availablerecord updated
  6. Added to CISA KEVransomware campaign

Affected products

And 53 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Scored 7.8 by NVD.

How it is reached

  • Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required NoneNo authentication required — anyone can exploit this
  • User Interaction RequiredA user must click a link, open a file, or perform some action

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

Sources

References in the record

And 6 more references. See all after sign-in

In the news

Watch the software you run.

My Stack ranks new CVEs for your products by real-world exploitation, so the next exploited one reaches you without reading every advisory.

We'll flag the next CVE, public exploit or patch for Windows 10 Version 1809, not every advisory. This one: actively exploited.