Is CVE-2023-4489 actively exploited?

No active exploitation of CVE-2023-4489 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-4489 be exploited remotely?

Yes. CVE-2023-4489 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-4489?

CVE-2023-4489 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2023-4489

CWE-1279Published: December 14, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

The first S0 encryption key is generated with an uninitialized PRNG in Z/IP Gateway products running Silicon Labs Z/IP Gateway SDK v7.18.3 and earlier. This makes the first S0 key generated at startup predictable, potentially allowing network key prediction and unauthorized S0 network access.

NVD Source

Risk Analysis

Silicon Labs Z/IP Gateway SDK uses an uninitialized PRNG to generate encryption keys, making them predictable. This critical flaw allows attackers to potentially gain unauthorized network access.

No public exploit is known, and it is not in the CISA KEV. It is remotely exploitable.

Recommended Action

Update to a patched version of the Z/IP Gateway SDK that properly initializes the PRNG.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-4489 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.