A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All…
Priority MEDIUM 43CWE-1284Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303), PLUSCONTROL 1st Gen (All versions). The total length of an UDP payload (set in the IP header) is unchecked. This may lead to various side effects, including Information Leak and Denial-of-Service conditions, depending on a user-defined applications that runs on top of the UDP protocol. (FSMD-2021-0006)
Why it matters now
EPSS 0.0163 76th percentileScored 2026-11-07
Fix Fixed Capital Embedded AR Classic R20-11 (Siemens): V2303
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Siemens | Capital Embedded AR Classic 431-422 | all versions | — | No fix listed | CNA |
| Siemens | Capital Embedded AR Classic R20-11 | before V2303 | V2303 | Patch available | CNA |
| Siemens | PLUSCONTROL 1st Gen | All versions | — | No fix listed | CNA |
- Capital Embedded AR Classic 431-422 VendorSiemens Affected all versions Fixed in — No fix listed CNA
- Capital Embedded AR Classic R20-11 VendorSiemens Affected before V2303 Fixed in V2303 Patch available CNA
- PLUSCONTROL 1st Gen VendorSiemens Affected All versions Fixed in — No fix listed CNA
CPE configurations NVD · 16
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:siemens:capital_vstar:*:*:*:*:*:*:*:* | all versions | Vulnerable | Siemens |
| cpe:2.3:a:siemens:nucleus_net:*:*:*:*:*:*:*:* | all versions | Vulnerable | Siemens |
| cpe:2.3:a:siemens:nucleus_readystart_v3:*:*:*:*:*:*:*:* | before 2014.12 | Vulnerable | Siemens |
| cpe:2.3:a:siemens:nucleus_source_code:*:*:*:*:*:*:*:* | all versions | Vulnerable | Siemens |
| cpe:2.3:o:siemens:apogee_modular_building_controller_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Siemens |
| cpe:2.3:h:siemens:apogee_modular_building_controller:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:apogee_modular_equiment_controller_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Siemens |
| cpe:2.3:h:siemens:apogee_modular_equiment_controller:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:apogee_pxc_compact_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Siemens |
| cpe:2.3:h:siemens:apogee_pxc_compact:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
- cpe:2.3:a:siemens:capital_vstar:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Siemens
- cpe:2.3:a:siemens:nucleus_net:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Siemens
- cpe:2.3:a:siemens:nucleus_readystart_v3:*:*:*:*:*:*:*:* Versions before 2014.12 Vulnerable ·Siemens
- cpe:2.3:a:siemens:nucleus_source_code:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Siemens
- cpe:2.3:o:siemens:apogee_modular_building_controller_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Siemens
- cpe:2.3:h:siemens:apogee_modular_building_controller:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:apogee_modular_equiment_controller_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Siemens
- cpe:2.3:h:siemens:apogee_modular_equiment_controller:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:apogee_pxc_compact_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Siemens
- cpe:2.3:h:siemens:apogee_pxc_compact:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
Show 6 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:siemens:apogee_pxc_modular_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Siemens |
| cpe:2.3:h:siemens:apogee_pxc_modular:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:talon_tc_compact_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Siemens |
| cpe:2.3:h:siemens:talon_tc_compact:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
| cpe:2.3:o:siemens:talon_tc_modular_firmware:*:*:*:*:*:*:*:* | all versions | Vulnerable | Siemens |
| cpe:2.3:h:siemens:talon_tc_modular:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Siemens |
- cpe:2.3:o:siemens:apogee_pxc_modular_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Siemens
- cpe:2.3:h:siemens:apogee_pxc_modular:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:talon_tc_compact_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Siemens
- cpe:2.3:h:siemens:talon_tc_compact:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
- cpe:2.3:o:siemens:talon_tc_modular_firmware:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Siemens
- cpe:2.3:h:siemens:talon_tc_modular:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens
Remediation
- Fix · CNA Capital Embedded AR Classic R20-11 (Siemens) Fixed in V2303
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Siemens Capital Embedded AR Classic R20-11 V2303
8 records Highest priority Priority MEDIUM 4 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2021-11879 A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All…Priority MEDIUM 44
- TI-2021-11878 Integer underflow in Siemens Capital Embedded AR Classic 431-422Priority MEDIUM 43
- TI-2021-11490 A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All…Priority MEDIUM 43
Timeline
- 2026-10-02 Threatist record created from CVE-2021-31345
- 2026-10-03 Alias added: GHSA-f3qp-9gxf-f3c8
References
Advisory 2
Other 6
- https://cert-portal.siemens.com/productcert/pdf/ssa-620288.pdf
- https://cert-portal.siemens.com/productcert/pdf/ssa-845392.pdf
- https://cert-portal.siemens.com/productcert/html/ssa-114589.html
- https://cert-portal.siemens.com/productcert/html/ssa-044112.html
- https://cert-portal.siemens.com/productcert/html/ssa-620288.html
- https://cert-portal.siemens.com/productcert/html/ssa-845392.html
More Siemens Apogee Modular Building Controller Firmware vulnerabilities
- TI-2021-11875 Out-of-bounds write in Siemens APOGEE MBC CVSS 3.1CRITICAL 9.8
- TI-2022-17998 Uncontrolled resource consumption in Siemens APOGEE MBC CVSS 4.0HIGH 8.7
- TI-2021-11873 A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE… CVSS 3.1CRITICAL 9.8
- TI-2021-11879 A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All… CVSS 3.1CRITICAL 9.1
- TI-2021-11878 Integer underflow in Siemens Capital Embedded AR Classic 431-422 CVSS 3.1CRITICAL 9.1
- TI-2021-11877 Out-of-bounds write in Siemens APOGEE MBC CVSS 3.1HIGH 8.8
Sources
- CVE-2021-31345 · CVE Program
- CVE-2021-31345 · NVD
- FIRST EPSS
- GHSA-f3qp-9gxf-f3c8 · GitHub Advisory Database · CC BY 4.0
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