LenelS2 NetBox Improper Neutralization of Special Elements

published 2024-05-30 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-27372

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

honeywell lenels2_netbox 5.6.2

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-24-151-01 updated 2024-05-30 cvss 9.1

LenelS2 NetBox

LenelS2 NetBox <5.6.2
affected: vendor fix, mitigation “For more information, see Carrier's security bulletin for LenelS2.” corporate.carrier.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-05-31)

Exploit prediction

0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

LenelS2 NetBox
carrier lenels2_netbox

Classification

Weakness

CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

corporate.carrier.com /Images/CARR-PSA-2024-01-NetBox_tcm558-227956.pdf
vendor-advisory, broken-link
cisa.gov /news-events/ics-advisories/icsa-24-151-01
government-resource, us-government-resource, vendor-advisory

Sources

CVE List CVE-2024-2421
NVD CVE-2024-2421

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary