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CVE-2021-34521

No known exploitation. EPSS puts it in the 84th percentile. Fixed versions are out.

CVSS 3.17.8HighEPSS percentile84th2.4% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix3 products3 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 1909Affected: ≥ 10.0.0, < 10.0.18363.1679Upgrade to: 10.0.18363.1679Affected: ≥ 10.0.0, < 10.0.19042.1110Upgrade to: 10.0.19042.1110Affected: ≥ 10.0.0, < 10.0.19043.1110Upgrade to: 10.0.19043.1110Stated by: CVE record
  • Microsoft Windows Server version 20H2Affected: ≥ 10.0.0, < 10.0.19042.1110Upgrade to: 10.0.19042.1110Stated by: CVE record
  • Microsoft Corp Raw Image ExtensionAffected: до 1.0.41311.0Upgrade to: not statedStated by: BDU

Versions as the sources state them. 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.

What it is

From the CVE record

Raw Image Extension 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.

EPSS84th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

2.4% chance of exploitation activity in the next 30 days, which ranks it in the 84th percentile of scored CVEs.

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

Lifecycle

7 events over 1853 days, from the signal feeds we watch.

  1. Patch availablerecord updated
  2. OpenVAS check added
  3. Patch availablerecord updated
  4. Publishedweakness classified

Affected products

And 7 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 2 more references. See all after sign-in

Watch the software you run.

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

We'll flag the next CVE, public exploit or patch for Windows 10 Version 1909, not every advisory.