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NVD / CVE Program· CNA siemens

CVE-2019-13939: A vulnerability has been identified in APOGEE MEC/MBC/PXC (P2) (All versions < V2.8.2), APOGEE PXC Compact (BACnet) (All versions < V3.5.3),

Noroxi assessment

Priority: Monitor (action score 28/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.71% (FIRST EPSS); higher than 53.8% of all records.
  • Someone on the same network segment can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.
  • Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A vulnerability has been identified in APOGEE MEC/MBC/PXC (P2) (All versions < V2.8.2), APOGEE PXC Compact (BACnet) (All versions < V3.5.3), APOGEE PXC Compact (P2 Ethernet) (All versions >= V2.8.2 < V2.8.19), APOGEE PXC Modular (BACnet) (All versions < V3.5.3), APOGEE PXC Modular (P2 Ethernet) (All versions >= V2.8.2 < V2.8.19), Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303), Desigo PXC00-E.D (All versions >= V2.3 < V6.0.327), Desigo PXC00-U (All versions >= V2.3x and < V6.00.327), Desigo PXC001-E.D (All versions >= V2.3 < V6.0.327), Desigo PXC100-E.D (All versions >= V2.3 < V6.0.327), Desigo PXC12-E.D (All versions >= V2.3 < V6.0.327), Desigo PXC128-U (All versions >= V2.3x and < V6.00.327), Desigo PXC200-E.D (All versions >= V2.3 < V6.0.327), Desigo PXC22-E.D (All versions >= V2.3 < V6.0.327), Desigo PXC22.1-E.D (All versions >= V2.3 < V6.0.327), Desigo PXC36.1-E.D (All versions >= V2.3 < V6.0.327), Desigo PXC50-E.D (All versions >= V2.3 < V6.0.327), Desigo PXC64-U (All versions >= V2.3x and < V6.00.327), Desigo PXM20-E (All versions >= V2.3 < V6.0.327), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.3), Nucleus Source Code (All versions), SIMOTICS CONNECT 400 (All versions < V0.3.0.330), TALON TC Compact (BACnet) (All versions < V3.5.3), TALON TC Modular (BACnet) (All versions < V3.5.3). By sending specially crafted DHCP packets to a device where the DHCP client is enabled, an attacker could change the IP address of the device to an invalid value.

HighCVSS 7.1 · v4.0—No exploit No fix recorded
Published
Jan 16, 2020
Updated
Jun 16, 2026
EPSS
0.7% · 53th percentile

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.7%

CNA vs NVD score

NVD
—
CNA · siemens
7.1
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2019-13939

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
siemenscapital vstar
siemensnucleus net
siemensnucleus readystart
siemensnucleus safetycert
siemensnucleus source code
siemensnucleus rtos
siemensapogee modular equiment controller firmware
siemensapogee modular equiment controller
siemensapogee modular building controller firmware
siemensapogee modular building controller
siemensapogee pxc firmware
siemensapogee pxc

and 34 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • siemens apogee modular building controller firmwarebefore 2.8.2
  • siemens apogee modular equiment controller firmwarebefore 2.8.2
  • siemens apogee pxc firmwareup to 2.8.2 inclusive
  • siemens capital vstarall versions
  • siemens desigo pxc firmware2.3 and later
  • siemens desigo pxc00-e.d firmware2.3.0 and later · before 6.00.327
  • siemens desigo pxc00-u firmware2.3.0 and later · before 6.00.327
  • siemens desigo pxc001-e.d firmware2.3.0 and later · before 6.00.327
  • siemens desigo pxc12-e.d firmware2.3.0 and later · before 6.00.327
  • siemens desigo pxc22-e.d firmware2.3.0 and later · before 6.00.327
  • siemens desigo pxc22.1-e.d firmware2.3.0 and later · before 6.00.327
  • siemens desigo pxc36.1-e.d firmware2.3.0 and later · before 6.00.327
  • siemens desigo pxm20 firmware2.3 and later
  • siemens desigopxc100-e.d firmwareall versions
  • siemens desigopxc128-u firmwareall versions
  • siemens desigopxc200-e.d firmwareall versions
  • siemens desigopxc50-e.d firmwareall versions
  • siemens desigopxc64-u firmwareall versions
  • siemens desigopxm20-e firmwareall versions
  • siemens nucleus netall versions

Versions reported by the vendor

Affected version ranges reported by the assigning authority (siemens). Independent of NVD's CPE analysis and usually ahead of it.

  • Siemens APOGEE MEC/MBC/PXC (P2)

    • All versions < V2.8.2affected

  • Siemens APOGEE PXC Compact (BACnet)

    • before V3.5.3affected

  • Siemens APOGEE PXC Compact (P2 Ethernet)

    • V2.8.2 and later · before V2.8.19affected

  • Siemens APOGEE PXC Modular (BACnet)

    • before V3.5.3affected

  • Siemens APOGEE PXC Modular (P2 Ethernet)

    • V2.8.2 and later · before V2.8.19affected

  • Siemens Capital Embedded AR Classic 431-422

    • all versionsaffected

  • Siemens Capital Embedded AR Classic R20-11

    • before V2303affected

  • Siemens Desigo PXC00-E.D

    • V2.3 and later · before V6.0.327affected

  • Siemens Desigo PXC00-U

    • All versions >= V2.3x and < V6.00.327affected

  • Siemens Desigo PXC001-E.D

    • V2.3 and later · before V6.0.327affected

  • Siemens Desigo PXC100-E.D

    • V2.3 and later · before V6.0.327affected

  • Siemens Desigo PXC12-E.D

    • V2.3 and later · before V6.0.327affected

Same product

siemens: all records

Other highest-scoring records for the same primary product.

  • CVE-2021-31884A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (
    39Monitor
  • CVE-2021-31890A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions
    37Monitor
  • CVE-2021-31889A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions
    37Monitor

Published before and after this one in the same product

  • Later →CVE-2020-28388Feb 9, 2021 · A vulnerability has been identified in APOGEE PXC Compact (BACnet) (All versions < V3.5.5), APOGEE PXC Compact (P2 Ethernet) (All versions <
    21Monitor
  • Later →CVE-2021-25663Apr 22, 2021 · A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions
    35Monitor
  • Later →CVE-2021-25664Apr 22, 2021 · A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions
    35Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone on the same network segment can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Adjacent
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-20 · Improper Input Validation

CVSS vector

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records