Siemens APOGEE PXC Compact (BACnet)

CVE-2020-28388

MEDIUM 6.5

At a glance

Source: NVD
EPSS: EPSS 1.35 % · percentile 72 (2026-10-31)
State: PUBLISHED
Published: 2021-02-09 00:00 UTC
Updated: 2026-06-02 20:14 UTC
Assigner: siemens
NVD status: Modified

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Description

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 < V3.5.5), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.20), Nucleus NET (All versions < V5.2), Nucleus ReadyStart V3 (All versions < V2012.12), Nucleus Source Code (All versions), PLUSCONTROL 1st Gen (All versions), TALON TC Compact (BACnet) (All versions < V3.5.5), TALON TC Modular (BACnet) (All versions < V3.5.5). Initial Sequence Numbers (ISNs) for TCP connections are derived from an insufficiently random source. As a result, the ISN of current and future TCP connections could be predictable. An attacker could hijack existing sessions or spoof future ones.

Weaknesses (CWE)

CWE-342 — Predictable Exact Value from Previous Values

References

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P/RL:O/RC:C	siemens
CVSS 3.1	MEDIUM 6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L	NVD · productcert@siemens.com (Secondary)
CVSS 3.1	MEDIUM 5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	NVD · nvd@nist.gov (Primary)
CVSS 2.0	MEDIUM 5.0	AV:N/AC:L/Au:N/C:N/I:P/A:N	NVD · nvd@nist.gov (Primary)

European references

ENISA EUVD · EUVD-2020-20847
GCVE · GCVE-0-2020-28388

CERT-FR advisories

CERTFR-2023-AVI-0633 — Multiples vulnérabilités dans les produits Siemens · cert.ssi.gouv.fr
CERTFR-2022-AVI-1094 — Multiples vulnérabilités dans les produits Siemens · cert.ssi.gouv.fr
CERTFR-2021-AVI-854 — Multiples vulnérabilités dans les produits Siemens · cert.ssi.gouv.fr
CERTFR-2021-AVI-176 — Multiples vulnérabilités dans les produits Siemens · cert.ssi.gouv.fr
CERTFR-2021-AVI-094 — Multiples vulnérabilités dans les produits Siemens · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:siemens:capital_vstar:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:nucleus_net:*:*:*:*:*:*:*:* < 5.2
cpe:2.3:a:siemens:nucleus_source_code:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:pluscontrol_1st_gen:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:nucleus_readystart:*:*:*:*:*:*:*:* < 2012.12

Affected products

Product	Versions
Siemens · APOGEE PXC Compact (BACnet)	affected All versions < V3.5.5
Siemens · APOGEE PXC Compact (P2 Ethernet)	affected All versions < V2.8.20
Siemens · APOGEE PXC Modular (BACnet)	affected All versions < V3.5.5
Siemens · APOGEE PXC Modular (P2 Ethernet)	affected All versions < V2.8.20
Siemens · Nucleus NET	affected All versions < V5.2
Siemens · Nucleus ReadyStart V3	affected All versions < V2012.12
Siemens · Nucleus Source Code	affected All versions
Siemens · PLUSCONTROL 1st Gen	affected All versions
Siemens · TALON TC Compact (BACnet)	affected All versions < V3.5.5
Siemens · TALON TC Modular (BACnet)	affected All versions < V3.5.5

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD

🟡 Siemens APOGEE PXC Compact (BACnet)