CVE-2024-21878: Improper Neutralization of Special Elements used in a Command ('Command Injection') vulnerability in Enphase I

Q: How do I fix CVE-2024-21878?

iq gateway firmware: upgrade to 8.2.4225. Exact commands for each OS are on this page.

Q: Is CVE-2024-21878 being exploited?

CVE-2024-21878 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-21878 affect?

CVE-2024-21878 affects iq gateway firmware. Severity is critical (CVSS 9.8). 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 af

Q: How urgent is CVE-2024-21878?

Priority 58/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2024-21878 is a critical-severity flaw (CVSS 9.8) affecting iq gateway firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 27%)
CISA exploited list	No
Weakness	CWE-77, CWE-78
Published	2024-08-12
Last modified	2026-06-17

Publisher (CNA): Dutch Institute for Vulnerability Disclosure · Vendor: enphase

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-08-12 13:38 UTCPublished CVE record published
2026-06-17 07:10 UTCUpdated Record last modified

enphase iq gateway firmware UPGRADE

Affected: >= 4.0 and < 8.2.4225

Fixed in: 8.2.4225

Safe to downgrade to: a release before 4.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-21878?

iq gateway firmware: upgrade to 8.2.4225. Exact commands for each OS are on this page.

Is CVE-2024-21878 being exploited?

CVE-2024-21878 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-21878 affect?

CVE-2024-21878 affects iq gateway firmware. Severity is critical (CVSS 9.8). 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 af

How urgent is CVE-2024-21878?

Priority 58/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Envoy vulnerabilities

Related CVEs

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CVE-2024-21877 MEDIUM 6.5 UPGRADE Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability through a url par
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References

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