CVE-2023-6533
Silabs Z-Wave Pc-Based Controller ≤ 5.54
Raw vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2023-6533 is a medium-severity Uncaught Exception (CWE-248) vulnerability in Silabs Z-Wave Pc-Based Controller. Its CVSS base score is 6.5 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Steganography (T1001.002); ranked at the 15th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified map to AC-3 (Access Enforcement) and IA-2 (Identification and Authentication (Organizational Users)) — see the control section below for these in your framework.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-58764
Vulnerability Data
Malformed Device Reset Locally Command Class packets can be sent to the controller, causing the controller to assume the end device has left the network. After this, frames sent by the end device will not be acknowledged by the controller.…
more
This vulnerability exists in PC Controller v5.54.0, and earlier.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
—
—
- 4 hardening rules · 2 OS baselines
—
Mitigating Controls (NIST 800-53 r5) AI
Enforces authorization on the primary administrative channel so the weakness cannot be exploited.
Requires unique identification and authentication before any administrative channel use.
Requires documented protections and controls specifically for remote administrative channels.
Security engineering principles include robust exception management to keep the system in a defined state.
Ensures session authenticity so an unprotected primary channel cannot be hijacked.
Fail-in-known-state reduces the impact when an uncaught exception occurs by preserving a safe condition.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Strong authentication directly prevents use of an unprotected admin channel.
Enforcing least-privilege access on the channel mitigates the unprotected primary channel.
Protecting data-in-transit integrity and confidentiality secures the primary channel itself.
Network-level controls that block unauthorized logical access close the unprotected channel.
Secure SDLC practices explicitly require structured exception handling to prevent uncaught exceptions from reaching production.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Hardening callouts derived
Configuration rules from DISA STIG baselines that bear on weaknesses of the type cited by this CVE. Each rule is shown with the relationship its mapping actually records, against the CWE it was authored against. Derived via CVE→CWE over `controls_xwalks` (higher-evidence rows only; rows rated `none` are excluded).
Oracle Linux 8 (2 rules)
- V-248827 OL 8 must not have the rsh-server package installed. blocks CWE-419
- V-248823 OL 8 must not have the telnet-server package installed. blocks CWE-419
Oracle Linux 9 (1 rule)
- V-271707 OL 9 must enable the Pluggable Authentication Module (PAM) interface for SSHD. blocks CWE-419