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CVE-2020-27736

A vulnerability has been identified in APOGEE PXC Compact (BACnet) (All versions < V3.5.5), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.20), APOGEE PXC Modular (BACnet) (All versions < V3...

No known exploitation. EPSS puts it in the 89th percentile. A vendor fix is available.

CVSS 3.16.5MediumEPSS percentile89th3.6% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFixVendor fixNo build named by the sources

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

NVD CVE.org

What to do

The vendor has published a fix. Version details are below where the sources state them.

  • Siemens SIMOTICS CONNECT 400Affected: All versions < V0.5.0.0Upgrade to: not statedStated by: CVE record
  • Siemens Nucleus ReadyStart V3Affected: All versions < V2017.02.3Upgrade to: not statedStated by: CVE record
  • Siemens Nucleus ReadyStart V4Affected: All versions < V4.1.0Upgrade to: not statedStated by: CVE record
  • Siemens APOGEE PXC CompactAffected: All versions < V3.5.5Upgrade to: not statedStated by: CVE record
  • Siemens APOGEE PXC CompactAffected: All versions < V2.8.20Upgrade to: not statedStated by: CVE record

Versions as the sources state them. 7 more products have version data. Full version matrix after sign-in

What it is

From the CVE record

SIMOTICS CONNECT 400 is affected by DNS Client vulnerabilities as initially reported in Siemens Security Advisory SSA-705111 (https://cert-portal.siemens.com/productcert/pdf/ssa-705111.pdf) for the DNS Module in Nucleus RTOS. Siemens has released updates for the SIMOTICS CONNECT 400 and recommends to update to the latest version.

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.

EPSS89th
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

3.6% chance of exploitation activity in the next 30 days, which ranks it in the 89th percentile of scored CVEs.

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

Lifecycle

5 events over 1309 days, from the signal feeds we watch.

  1. Patch availablerecord updated
  2. Publishedweakness classified, att&ck mapped

Affected products

And 9 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:H/PR:N/UI:N/S:U/C:L/I:N/A:H

Scored 6.5 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
  • 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 LowSome restricted information is disclosed, but limited in scope
  • Integrity NoneNo integrity impact
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

And 18 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 SIMOTICS CONNECT 400, not every advisory.