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CVE-2020-28388

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CVE-2020-28388

Published: Feb 9, 2021

Modified: Jun 2, 2026

PUBLISHED

CVSS v3.1

6.5

MEDIUM

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.

VendorProductVersions

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

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

Low

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