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CVE-2021-31890

No known exploitation. EPSS puts it in the 83rd percentile. Fixed versions are out.

CVSS 3.17.5HighEPSS percentile83rd2.2% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix5 products3 fixed builds listed below

Published Updated Sources: CVE.org, NVD, BDU, CSAF

NVD CVE.org

What to do

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

  • Siemens Capital Embedded AR Classic R20-11Affected: < V2303Upgrade to: V2303Stated by: CVE record
  • Siemens PLUSCONTROL 1st GenAffected: All versionsUpgrade to: not statedStated by: CVE record
  • Siemens SIMOTICS CONNECT 400Affected: All versions < V0.5.0.0Upgrade to: not statedStated by: CVE record
  • Siemens Nucleus Readystart V3Affected: < 2017.02.4Upgrade to: 2017.02.4Stated by: NVD
  • Siemens Nucleus Readystart V4Affected: < 4.1.1Upgrade to: 4.1.1Stated by: NVD

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

Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303), PLUSCONTROL 1st Gen (All versions), SIMOTICS CONNECT 400 (All versions < V0.5.0.0), SIMOTICS CONNECT 400 (All versions < V1.0.0.0). The total length of an TCP payload (set in the IP header) is unchecked. This may lead to various side effects, including Information Leak and Denial-of-Service conditions, depending on the network buffer organization in memory. (FSMD-2021-0017)

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.

EPSS83rd
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

2.2% chance of exploitation activity in the next 30 days, which ranks it in the 83rd percentile of scored CVEs.

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

Lifecycle

4 events over 1108 days, from the signal feeds we watch.

  1. Patch availablerecord updated
  2. Publishedweakness classified

Affected products

And 22 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:N/S:U/C:N/I:N/A:H

Scored 7.5 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 NoneNo confidentiality impact
  • Integrity NoneNo integrity impact
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

Sources

References in the record

And 33 more references. See all after sign-in

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