How severe is CVE-2024-2421?

CVE-2024-2421 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-2421 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-2024-2421?

CVE-2024-2421 affects Honeywell Lenels2 Netbox. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-2421?

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

Does CVE-2024-2421 have an EU (EUVD) identifier?

Yes. CVE-2024-2421 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-27372.

When was CVE-2024-2421 published?

CVE-2024-2421 was published on 2024-05-30 and last updated on 2026-06-17.

CVE-2024-2421

CVE-2024-2421 is a critical-severity vulnerability in Honeywell Lenels2 Netbox with a CVSS 3.x base score of 9.8. 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.3
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-27372
Weakness: CWE-78
Affected product: Honeywell Lenels2 Netbox
Published: 2024-05-30
Last modified: 2026-06-17

Description

LenelS2 NetBox access control and event monitoring system was discovered to contain an unauthenticated RCE in versions prior to and including 5.6.1, which allows an attacker to execute malicious commands with elevated permissions.

Frequently asked questions

What is CVE-2024-2421?: LenelS2 NetBox access control and event monitoring system was discovered to contain an unauthenticated RCE in versions prior to and including 5.6.1, which allows an attacker to execute malicious commands with elevated permissions.
How severe is CVE-2024-2421?: CVE-2024-2421 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-2421 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-2024-2421?: CVE-2024-2421 affects Honeywell Lenels2 Netbox. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-2421?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2024-2421 have an EU (EUVD) identifier?: Yes. CVE-2024-2421 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-27372.
When was CVE-2024-2421 published?: CVE-2024-2421 was published on 2024-05-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:honeywell:lenels2_netbox:*:*:*:*:*:*:*:*

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