How severe is CVE-2024-42058?

CVE-2024-42058 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-42058 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-42058?

CVE-2024-42058 affects Zyxel Zld. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-42058?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-42058 have an EU (EUVD) identifier?

Yes. CVE-2024-42058 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-39426.

When was CVE-2024-42058 published?

CVE-2024-42058 was published on 2024-09-03 and last updated on 2026-06-17.

CVE-2024-42058

CVE-2024-42058 is a high-severity vulnerability in Zyxel Zld with a CVSS 3.x base score of 7.5. 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-476.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-39426
Weakness: CWE-476
Affected product: Zyxel Zld
Published: 2024-09-03
Last modified: 2026-06-17

Description

A null pointer dereference vulnerability in Zyxel ATP series firmware versions from V4.32 through V5.38, USG FLEX series firmware versions from V4.50 through V5.38, USG FLEX 50(W) series firmware versions from V5.20 through V5.38, and USG20(W)-VPN series firmware versions from V5.20 through V5.38 could allow an unauthenticated attacker to cause DoS conditions by sending crafted packets to a vulnerable device.

Frequently asked questions

What is CVE-2024-42058?: A null pointer dereference vulnerability in Zyxel ATP series firmware versions from V4.32 through V5.38, USG FLEX series firmware versions from V4.50 through V5.38, USG FLEX 50(W) series firmware versions from V5.20 through V5.38, and USG20(W)-VPN series firmware versions from V5.20 through V5.38 could allow an unauthenticated attacker to cause DoS conditions by sending crafted packets to a vulnerable device.
How severe is CVE-2024-42058?: CVE-2024-42058 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-42058 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-42058?: CVE-2024-42058 affects Zyxel Zld. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-42058?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-42058 have an EU (EUVD) identifier?: Yes. CVE-2024-42058 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-39426.
When was CVE-2024-42058 published?: CVE-2024-42058 was published on 2024-09-03 and last updated on 2026-06-17.

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-09-03-2024

Affected products (1)

cpe:2.3:o:zyxel:zld:*:*:*:*:*:*:*:*

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