CVE-2026-0711: A post-authentication command injection vulnerability in the EasyMesh-related APIs of Zyxel DX3300-T0 firmware
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Routine
MEDIUM 6.8MITIGATEMITIGATEMITIGATE
CVE-2026-0711 is a medium-severity flaw (CVSS 6.8) affecting nr5307 firmware, nebula fwa515 firmware, dx3300-t0 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A post-authentication command injection vulnerability in the EasyMesh-related APIs of Zyxel DX3300-T0 firmware versions through 5.50(ABVY.7.1)C0 could allow an authenticated, adjacent attacker with administrator privileges to execute OS commands on an affected device.
Why this priority
No elevated risk signals yet
No fix is published yet: follow the downgrade or mitigation steps.
Last updated 2026-07-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
Published CVE record published
Updated Record last modified
zyxel nr5307 firmware MITIGATE
Affected: < 2.00\(acjt.3\)c0
Fixed in: 2.00\(acjt.3\)c0
Safe to downgrade to: no unaffected older release
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.
zyxel nebula fwa515 firmware MITIGATE
Affected: < 1.60\(acpz.0\)v0
Fixed in: 1.60\(acpz.0\)v0
Safe to downgrade to: no unaffected older release
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.
zyxel dx3300-t0 firmware MITIGATE
Affected: < 5.50\(abvy.7.2\)c0
Fixed in: 5.50\(abvy.7.2\)c0
Safe to downgrade to: no unaffected older release
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.
zyxel dx3300-t1 firmware MITIGATE
Affected: < 5.50\(abvy.7.2\)c0
Fixed in: 5.50\(abvy.7.2\)c0
Safe to downgrade to: no unaffected older release
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.
zyxel dx3301-t0 firmware MITIGATE
Affected: < 5.50\(abvy.7.2\)c0
Fixed in: 5.50\(abvy.7.2\)c0
Safe to downgrade to: no unaffected older release
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.
zyxel dx5401-b0 firmware MITIGATE
Affected: < 5.17\(abyo.7.2\)c0
Fixed in: 5.17\(abyo.7.2\)c0
Safe to downgrade to: no unaffected older release
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 sourceNVD · 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-2026-0711?
nr5307 firmware: mitigate or apply the listed mitigation; nebula fwa515 firmware: mitigate or apply the listed mitigation; dx3300-t0 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2026-0711 being exploited?
CVE-2026-0711 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-2026-0711 affect?
CVE-2026-0711 affects nr5307 firmware, nebula fwa515 firmware, dx3300-t0 firmware. Severity is medium (CVSS 6.8). A post-authentication command injection vulnerability in the EasyMesh-related APIs of Zyxel DX3300-T0 firmware versions through 5.50(ABVY.7.1)C0 could allow an authenticated, adjacent attacker with administrator privileges to execute OS com
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