NVD / CVE Program· CNA siemens

CVE-2022-38371: A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (

Noroxi assessment

Priority: Monitor (action score 34/100)

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: 1.5% (FIRST EPSS); higher than 75.8% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
According to the record, no fixed version is available yet.

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 MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (PPC) (BACnet) (All versions), APOGEE MEC (PPC) (P2 Ethernet) (All versions), APOGEE PXC Compact (BACnet) (All versions < V3.5.7), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.21), APOGEE PXC Modular (BACnet) (All versions < V3.5.7), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.21), Desigo PXC00-E.D (All versions >= V2.3 < V6.30.37), Desigo PXC00-U (All versions >= V2.3 < V6.30.37), Desigo PXC001-E.D (All versions >= V2.3 < V6.30.37), Desigo PXC100-E.D (All versions >= V2.3 < V6.30.37), Desigo PXC12-E.D (All versions >= V2.3 < V6.30.37), Desigo PXC128-U (All versions >= V2.3 < V6.30.37), Desigo PXC200-E.D (All versions >= V2.3 < V6.30.37), Desigo PXC22-E.D (All versions >= V2.3 < V6.30.37), Desigo PXC22.1-E.D (All versions >= V2.3 < V6.30.37), Desigo PXC36.1-E.D (All versions >= V2.3 < V6.30.37), Desigo PXC50-E.D (All versions >= V2.3 < V6.30.37), Desigo PXC64-U (All versions >= V2.3 < V6.30.37), Desigo PXM20-E (All versions >= V2.3 < V6.30.37), Nucleus NET for Nucleus PLUS V1 (All versions < V5.2a), Nucleus NET for Nucleus PLUS V2 (All versions < V5.4), Nucleus ReadyStart V3 V2012 (All versions < V2012.08.1), Nucleus ReadyStart V3 V2017 (All versions < V2017.02.4), Nucleus Source Code (All versions including affected FTP server), TALON TC Compact (BACnet) (All versions < V3.5.7), TALON TC Modular (BACnet) (All versions < V3.5.7). The FTP server does not properly release memory resources that were reserved for incomplete connection attempts by FTP clients. This could allow a remote attacker to generate a denial of service condition on devices that incorporate a vulnerable version of the FTP server.

HighCVSS 8.7 · v4.0—No exploit No fix recorded

Published: Oct 11, 2022
Updated: Jun 17, 2026
EPSS: 1.5% · 75th percentile
CWE: CWE-400

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 34 / 40 · 8.7 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 1.5%

CISA SSVC decision

Exploitation: none
Automatable: yes
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · siemens: 7.5; NVD has not scored this yet; the score shown is the CNA’s.

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

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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.

Vendor	Product	CPE
siemens	nucleus net	cpe:2.3:a:siemens:nucleus_net
siemens	nucleus readystart v3	cpe:2.3:a:siemens:nucleus_readystart_v3
siemens	nucleus source code	cpe:2.3:a:siemens:nucleus_source_code
siemens	apogee modular building controller firmware	cpe:2.3:o:siemens:apogee_modular_building_controller_firmware
siemens	apogee modular building controller	cpe:2.3:h:siemens:apogee_modular_building_controller
siemens	apogee modular equiment controller firmware	cpe:2.3:o:siemens:apogee_modular_equiment_controller_firmware
siemens	apogee modular equiment controller	cpe:2.3:h:siemens:apogee_modular_equiment_controller
siemens	apogee pxc compact firmware	cpe:2.3:o:siemens:apogee_pxc_compact_firmware
siemens	apogee pxc compact	cpe:2.3:h:siemens:apogee_pxc_compact
siemens	apogee pxc modular firmware	cpe:2.3:o:siemens:apogee_pxc_modular_firmware
siemens	apogee pxc modular	cpe:2.3:h:siemens:apogee_pxc_modular
siemens	desigo pxc00-e.d firmware	cpe:2.3:o:siemens:desigo_pxc00-e.d_firmware

and 27 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 firmwareall versions
siemens apogee modular equiment controller firmwareall versions
siemens apogee pxc compact firmwareall versions
siemens apogee pxc modular firmwareall versions
siemens desigo pxc00-e.d firmwareup to 2.3 inclusive
siemens desigo pxc00-u firmwareup to 2.3 inclusive
siemens desigo pxc001-e.d firmwareup to 2.3 inclusive
siemens desigo pxc100-e.d firmwareup to 2.3 inclusive
siemens desigo pxc12-e.d firmwareup to 2.3 inclusive
siemens desigo pxc128-u firmwareup to 2.3 inclusive
siemens desigo pxc200-e.d firmwareup to 2.3 inclusive
siemens desigo pxc22-e.d firmwareup to 2.3 inclusive
siemens desigo pxc22.1-e.d firmwareup to 2.3 inclusive
siemens desigo pxc36.1-e.d firmwareup to 2.3 inclusive
siemens desigo pxc50-e.d firmwareup to 2.3 inclusive
siemens desigo pxc64-u firmwareup to 2.3 inclusive
siemens desigo pxm20-e firmwareup to 2.3 inclusive
siemens nucleus netall versions
siemens nucleus readystart v3all versions
siemens nucleus source codeall 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 MBC (PPC) (BACnet)
- All versionsaffected
Siemens APOGEE MBC (PPC) (P2 Ethernet)
- All versionsaffected
Siemens APOGEE MEC (PPC) (BACnet)
- All versionsaffected
Siemens APOGEE MEC (PPC) (P2 Ethernet)
- All versionsaffected
Siemens APOGEE PXC Compact (BACnet)
- before V3.5.7affected
Siemens APOGEE PXC Compact (P2 Ethernet)
- before V2.8.21affected
Siemens APOGEE PXC Modular (BACnet)
- before V3.5.7affected
Siemens APOGEE PXC Modular (P2 Ethernet)
- before V2.8.21affected
Siemens Desigo PXC00-E.D
- V2.3 and later · before V6.30.37affected
Siemens Desigo PXC00-U
- V2.3 and later · before V6.30.37affected
Siemens Desigo PXC001-E.D
- V2.3 and later · before V6.30.37affected
Siemens Desigo PXC100-E.D
- V2.3 and later · before V6.30.37affected

Same product

siemens: all records

Other highest-scoring records for the same primary product.

CVE-2021-31886A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (
40Plan
CVE-2021-31888A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (
36Monitor
CVE-2021-31887A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (
36Monitor

Published before and after this one in the same product

← EarlierCVE-2020-27009Apr 22, 2021 · A vulnerability has been identified in APOGEE PXC Compact (BACnet) (All versions < V3.5.5), APOGEE PXC Compact (P2 Ethernet) (All versions <
34Monitor
← EarlierCVE-2020-27736Apr 22, 2021 · A vulnerability has been identified in APOGEE PXC Compact (BACnet) (All versions < V3.5.5), APOGEE PXC Compact (P2 Ethernet) (All versions <
27Monitor
← EarlierCVE-2021-27393Apr 22, 2021 · A vulnerability has been identified in Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2013.08), Nucleus Source Code (Ver
21Monitor

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).

Technical details

Attack conditions

Anyone who can reach it over the internet 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: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: X

Weakness class (CWE)

CWE-400 · Uncontrolled Resource Consumption

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

The bug in code

The whole CWE-400 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1function expand(node) {
2  return node.children.map(expand);
3}

Fixed

1const MAX_DEPTH = 32;
2function expand(node, depth = 0) {
3  if (depth > MAX_DEPTH) throw new Error("too deep");
4  return node.children.map((c) => expand(c, depth + 1));
5}

Attack context

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

Attack patterns (CAPEC)

ATT&CK techniques

Endpoint Denial of ServiceT1499

Change log

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

References

cert-portal.siemens.com/productcert/html/ssa-313313.html

Show all references (3 more)

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

All records