CVE-2024-21876: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability via a URL paramet

Q: How do I fix CVE-2024-21876?

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

Q: Is CVE-2024-21876 being exploited?

CVE-2024-21876 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-2024-21876 affect?

CVE-2024-21876 affects iq gateway firmware. Severity is critical (CVSS 9.1). 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 iss

Q: How urgent is CVE-2024-21876?

Priority 51/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.1REMOTEUPGRADE

CVE-2024-21876 is a critical-severity flaw (CVSS 9.1) affecting iq gateway firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-22
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-2024-21876?

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

Is CVE-2024-21876 being exploited?

CVE-2024-21876 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-2024-21876 affect?

CVE-2024-21876 affects iq gateway firmware. Severity is critical (CVSS 9.1). 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 iss

How urgent is CVE-2024-21876?

Priority 51/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

Envoy vulnerabilities

Related CVEs

CVE-2024-21880 HIGH 7.2 UPGRADE Improper Neutralization of Special Elements used in a Command ('Command Injection') vulnerability via the url
CVE-2024-21879 HIGH 8.8 UPGRADE Improper Neutralization of Special Elements used in a Command ('Command Injection') vulnerability through an u
CVE-2024-21878 CRITICAL 9.8 UPGRADE Improper Neutralization of Special Elements used in a Command ('Command Injection') vulnerability in Enphase I
CVE-2024-21877 MEDIUM 6.5 UPGRADE Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability through a url par

References

← Back to latest CVEs