How severe is CVE-2024-21878?

CVE-2024-21878 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-2024-21878 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-21878?

CVE-2024-21878 affects Enphase Iq Gateway Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-21878?

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-2024-21878 have an EU (EUVD) identifier?

Yes. CVE-2024-21878 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19489.

When was CVE-2024-21878 published?

CVE-2024-21878 was published on 2024-08-12 and last updated on 2026-06-17.

CVE-2024-21878

CVE-2024-21878 is a critical-severity vulnerability in Enphase Iq Gateway Firmware 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: 9.2
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-19489
Weakness: CWE-78
Affected product: Enphase Iq Gateway Firmware
Published: 2024-08-12
Last modified: 2026-06-17

Description

Improper Neutralization of Special Elements used in a Command ('Command Injection') vulnerability in Enphase IQ Gateway (formerly known as Envoy) allows OS Command Injection. This vulnerability is present in an internal script.This issue affects Envoy: from 4.x up to and including 8.x and is currently unpatched.

Frequently asked questions

What is CVE-2024-21878?: Improper Neutralization of Special Elements used in a Command ('Command Injection') vulnerability in Enphase IQ Gateway (formerly known as Envoy) allows OS Command Injection. This vulnerability is present in an internal script.This issue affects Envoy: from 4.x up to and including 8.x and is currently unpatched.
How severe is CVE-2024-21878?: CVE-2024-21878 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-2024-21878 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-21878?: CVE-2024-21878 affects Enphase Iq Gateway Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-21878?: 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-2024-21878 have an EU (EUVD) identifier?: Yes. CVE-2024-21878 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19489.
When was CVE-2024-21878 published?: CVE-2024-21878 was published on 2024-08-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:enphase:iq_gateway_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Enphase Iq Gateway Firmware

CVE-2024-21876 — Critical (CVSS 9.1): Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability via a URL parameter in…
CVE-2024-21879 — High (CVSS 8.8): Improper Neutralization of Special Elements used in a Command ('Command Injection') vulnerability through an url…
CVE-2024-21880 — High (CVSS 7.2): Improper Neutralization of Special Elements used in a Command ('Command Injection') vulnerability via the url parameter…
CVE-2024-21877 — Medium (CVSS 6.5): Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability through a url parameter in…

All CVEs affecting Enphase Iq Gateway Firmware →

Other CWE-78 (OS Command Injection) vulnerabilities

CVE-2026-56004 — Critical (CVSS 10.0): A shellcode injection in the mercurial handler of the obs tar_scm source service before version 0.12.4 could be used by…
CVE-2026-56415 — Critical (CVSS 10.0): Storage Concentrator (SC & SCVM) contains a command injection vulnerability within the debug.pl script that is…
CVE-2026-56413 — Critical (CVSS 10.0): Storage Concentrator (SC & SCVM) contains a command injection vulnerability in the ms_service.pl service, which listens…
CVE-2026-49869 — Critical (CVSS 10.0): Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, AuthenticationFilter in…
CVE-2026-49261 — Critical (CVSS 10.0): MariaDB server is a community developed fork of MySQL server. Versions 10.6.1 through 10.6.26, 10.11.1 through…
CVE-2026-10520 — Critical (CVSS 10.0): An OS Command Injection vulnerability in Ivanti Sentry before the R10.5.2, R10.6.2 and R10.7.1 versions allows a…

Browse all CWE-78 (OS Command Injection) vulnerabilities →