How severe is CVE-2024-21876?

CVE-2024-21876 has a CVSS 3.x base score of 9.1, 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 none.

Is CVE-2024-21876 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-21876?

CVE-2024-21876 affects Enphase Iq Gateway Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-21876?

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-2024-21876 have an EU (EUVD) identifier?

Yes. CVE-2024-21876 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19487.

When was CVE-2024-21876 published?

CVE-2024-21876 was published on 2024-08-12 and last updated on 2026-06-17.

CVE-2024-21876

CVE-2024-21876 is a critical-severity vulnerability in Enphase Iq Gateway Firmware with a CVSS 3.x base score of 9.1. 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-22.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v4: 9.3
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-19487
Weakness: CWE-22
Affected product: Enphase Iq Gateway Firmware
Published: 2024-08-12
Last modified: 2026-06-17

Description

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability via a URL parameter in Enphase IQ Gateway (formerly known as Envoy) allows an unautheticated attacker to access or create arbitratry files.This issue affects Envoy: from 4.x to 8.x and < 8.2.4225.

Frequently asked questions

What is CVE-2024-21876?: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability via a URL parameter in Enphase IQ Gateway (formerly known as Envoy) allows an unautheticated attacker to access or create arbitratry files.This issue affects Envoy: from 4.x to 8.x and < 8.2.4225.
How severe is CVE-2024-21876?: CVE-2024-21876 has a CVSS 3.x base score of 9.1, 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 none.
Is CVE-2024-21876 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-21876?: CVE-2024-21876 affects Enphase Iq Gateway Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-21876?: 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-2024-21876 have an EU (EUVD) identifier?: Yes. CVE-2024-21876 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-19487.
When was CVE-2024-21876 published?: CVE-2024-21876 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-2024-21878 — Critical (CVSS 9.8): Improper Neutralization of Special Elements used in a Command ('Command Injection') vulnerability in Enphase IQ Gateway…
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…

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