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CVE-2019-11634

Exploited in the wild. In CISA KEV since 2021‑11‑03. Fixed in 1904.

CVSS 3.19.8CriticalEPSS percentile95th8.1% chance in 30 daysCISA KEVListedsince 2021-11-03, due 2022-05-03
No public exploit knownFix1904Upgrade to this build
Check it yourself

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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.

  • Citrix WorkspaceAffected: < 1904Upgrade to: 1904Stated by: NVD
  • Citrix Systems Inc. Workspace AppAffected: до 1904Upgrade to: not statedStated by: BDU

Versions as the sources state them. Full version matrix after sign-in

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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

Citrix Workspace App before 1904 for Windows has Incorrect Access Control.

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.

EPSS95th
CISA KEV
CISA KEV

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

US federal agencies must remediate by 2022-05-03.

Known use in ransomware campaigns.

Apply updates per vendor instructions.
Public exploits

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

EPSS

8.1% chance of exploitation activity in the next 30 days, which ranks it in the 95th percentile of scored CVEs.

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

Lifecycle

9 events over 2639 days, from the signal feeds we watch.

  1. Patch availablerecord updated
  2. EPSS band changehigh → low
  3. EPSS band changemoderate → high
  4. Patch availablerecord updated
  5. Added to CISA KEVransomware campaign
  6. Publishedweakness classified

Affected products

And 1 more affected product. 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:N/S:U/C:H/I:H/A:H

Scored 9.8 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 NoneNo user interaction needed — fully automated exploitation

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 3 more references. 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 Receiver, not every advisory. This one: actively exploited.