How severe is CVE-2023-4489?

CVE-2023-4489 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over physical access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-4489 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-4489?

CVE-2023-4489 affects Silabs Z/ip Gateway Sdk. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-4489?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-4489 published?

CVE-2023-4489 was published on 2023-12-14 and last updated on 2026-06-17.

CVE-2023-4489

CVE-2023-4489 is a medium-severity vulnerability in Silabs Z/ip Gateway Sdk with a CVSS 3.x base score of 6.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-908.

Key facts

Severity: Medium (CVSS 3.x base score 6.4)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-908
Affected product: Silabs Z/ip Gateway Sdk
Published: 2023-12-14
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-4489?: 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.
How severe is CVE-2023-4489?: CVE-2023-4489 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over physical access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-4489 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-4489?: CVE-2023-4489 affects Silabs Z/ip Gateway Sdk. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-4489?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-4489 published?: CVE-2023-4489 was published on 2023-12-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:silabs:z\/ip_gateway_sdk:*:*:*:*:*:*:*:*

More vulnerabilities in Silabs Z/ip Gateway Sdk

CVE-2023-0972 — Critical (CVSS 9.6): Description: A vulnerability in SiLabs Z/IP Gateway 7.18.01 and earlier allows an unauthenticated attacker within…
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CVE-2023-0969 — Low (CVSS 3.5): A vulnerability in SiLabs Z/IP Gateway 7.18.01 and earlier allows an authenticated attacker within Z-Wave range to…

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