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CVE-2023-36584

Exploited in the wild. In CISA KEV since 2023‑11‑16. Fixed versions are out.

CVSS 3.15.4MediumEPSS percentile88th3.3% chance in 30 daysCISA KEVListedsince 2023-11-16, due 2023-12-07
No public exploit knownFix5 products8 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: ≥ 10.0.17763.0, < 10.0.17763.4974Upgrade to: 10.0.17763.4974Affected: ≥ 10.0.19043.0, < 10.0.19041.3570Upgrade to: 10.0.19041.3570Affected: ≥ 10.0.19045.0, < 10.0.19045.3570Upgrade to: 10.0.19045.3570Affected: ≥ 10.0.10240.0, < 10.0.10240.20232Upgrade to: 10.0.10240.20232 + 1 more branchStated by: CVE record
  • Microsoft Windows Server 2019Affected: ≥ 10.0.17763.0, < 10.0.17763.4974Upgrade to: 10.0.17763.4974Stated by: CVE record
  • Microsoft Windows Server 2022Affected: ≥ 10.0.20348.0, < 10.0.20348.2031Upgrade to: 10.0.20348.2031Stated by: CVE record
  • Microsoft Windows 11 version 21H2Affected: ≥ 10.0.0, < 10.0.22000.2538Upgrade to: 10.0.22000.2538Affected: ≥ 10.0.22621.0, < 10.0.22621.2428Upgrade to: 10.0.22621.2428Stated by: CVE record
  • Microsoft Windows Server 2016Affected: ≥ 10.0.14393.0, < 10.0.14393.6351Upgrade to: 10.0.14393.6351Stated by: CVE record

Versions as the sources state them. 4 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.

What it is

From the CVE record

Windows Mark of the Web Security Feature Bypass 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.

EPSS88th
CISA KEV
CISA KEV

Listed as exploited in the wild since 2023-11-16.

US federal agencies must remediate by 2023-12-07.

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Public exploits

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

EPSS

3.3% chance of exploitation activity in the next 30 days, which ranks it in the 88th percentile of scored CVEs.

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

Attention now

Rising.

Lifecycle

7 events over 989 days, from the signal feeds we watch.

  1. OpenVAS check added
  2. EPSS band changemoderate → low
  3. Patch availablerecord updated
  4. Added to CISA KEV
  5. Publishedweakness classified

Affected products

And 45 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

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

Scored 5.4 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • 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 NoneNo confidentiality impact
  • Integrity LowData modification is possible but limited in scope or consequence
  • Availability LowReduced performance or intermittent disruption of service

Weaknesses

Sources

References in the record

And 1 more reference. See all after sign-in

Watch the software you run.

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We'll flag the next CVE, public exploit or patch for Microsoft Corp, not every advisory. This one: actively exploited.