CVE-2025-34035: An OS command injection vulnerability exists in EnGenius EnShare Cloud Service version 1.4.11 and earlier

This week

CRITICAL 9.8REMOTEMITIGATEMITIGATEMITIGATE

CVE-2025-34035 is a critical-severity flaw (CVSS 9.8) affecting esr300 firmware, esr350 firmware, esr600 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An OS command injection vulnerability exists in EnGenius EnShare Cloud Service version 1.4.11 and earlier. The usbinteract.cgi script fails to properly sanitize user input passed to the path parameter, allowing unauthenticated remote attackers to inject arbitrary shell commands. The injected commands are executed with root privileges, leading to full system compromise. Exploitation evidence was observed by the Shadowserver Foundation on 2024-12-0

Why this priority

Critical severity
EPSS top 2%: very likely to be exploited
Public exploit reference
CISA SSVC: automatable with total technical impact
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	24.8% (top 2%)
CISA exploited list	No
Weakness	CWE-78
Published	2025-06-24
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: engeniustech

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

Am I affected?

Timeline

2025-06-24 01:15 UTCPublished CVE record published
2026-06-17 09:13 UTCUpdated Record last modified

engeniustech esr300 firmware MITIGATE

Affected: 1.1.0.28 · 1.3.1.42 · 1.4.0 · 1.4.1.28 · 1.4.2 · 1.4.7 · 1.4.9

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.0.28

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.

engeniustech esr350 firmware MITIGATE

Affected: 1.1.0.29 · 1.3.1.41 · 1.4.0 · 1.4.2 · 1.4.5 · 1.4.9 · 1.4.11

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.0.29

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.

engeniustech esr600 firmware MITIGATE

Affected: 1.1.0.50 · 1.2.1.46 · 1.3.1.63 · 1.4.0.23 · 1.4.1 · 1.4.2 · 1.4.3 · 1.4.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.0.50

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.

engeniustech esr900 firmware MITIGATE

Affected: 1.1.0 · 1.2.2.23 · 1.3.0 · 1.3.1.26 · 1.3.5.18 · 1.4.0 · 1.4.3 · 1.4.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.0

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.

engeniustech esr1200 firmware MITIGATE

Affected: 1.1.0 · 1.3.1.34 · 1.4.1 · 1.4.3 · 1.4.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.0

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.

engeniustech esr1750 firmware MITIGATE

Affected: 1.1.0 · 1.2.2.27 · 1.3.0 · 1.3.1.34 · 1.4.0 · 1.4.1 · 1.4.3 · 1.4.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.0

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.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora ELN · fips-provider-next · FIXED · 1.5.3-3.eln159 · FEDORA-2026-3ce99ec7df · source

sudo dnf upgrade --advisory=FEDORA-2026-3ce99ec7df

Fedora 46 · rubygem-webmock · FIXED · 3.26.1-3.fc46 · FEDORA-2026-bb57b4d095 · source

sudo dnf upgrade --advisory=FEDORA-2026-bb57b4d095

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: www.exploit-db.com/exploits/42114
Write-up: www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5413.php
Nuclei scan template: EnGenius EnShare IoT Gigabit Cloud Service 1.4.11 Root Remote Code Execution

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-2025-34035?

esr300 firmware: mitigate or apply the listed mitigation; esr350 firmware: mitigate or apply the listed mitigation; esr600 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-34035 being exploited?

CVE-2025-34035 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-2025-34035 affect?

CVE-2025-34035 affects esr300 firmware, esr350 firmware, esr600 firmware. Severity is critical (CVSS 9.8). An OS command injection vulnerability exists in EnGenius EnShare Cloud Service version 1.4.11 and earlier. The usbinteract.cgi script fails to properly sanitize user input passed to the path parameter, allowing unauthenticated remote attack

How urgent is CVE-2025-34035?

Priority 72/100. Critical severity; EPSS top 2%: very likely to be exploited; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

References

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