CVE-2018-5265: Ubiquiti EdgeOS 1.9.1 on EdgeRouter Lite devices allows remote attackers to execute arbitrary code with admin

This month

HIGH 7.2MITIGATE

CVE-2018-5265 is a high-severity flaw (CVSS 7.2) affecting edgeos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Ubiquiti EdgeOS 1.9.1 on EdgeRouter Lite devices allows remote attackers to execute arbitrary code with admin credentials, because /opt/vyatta/share/vyatta-cfg/templates/system/static-host-mapping/host-name/node.def does not sanitize the 'alias' or 'ips' parameter for shell metacharacters.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	2.9% (top 13%)
CISA exploited list	No
Weakness	CWE-78
Published	2019-06-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ui

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

Am I affected?

Timeline

2019-06-07 15:29 UTCPublished CVE record published
2026-06-17 01:59 UTCUpdated Record last modified

ui edgeos MITIGATE

Affected: 1.9.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.9.1

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-2018-5265?

edgeos: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-5265 being exploited?

CVE-2018-5265 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-2018-5265 affect?

CVE-2018-5265 affects edgeos. Severity is high (CVSS 7.2). Ubiquiti EdgeOS 1.9.1 on EdgeRouter Lite devices allows remote attackers to execute arbitrary code with admin credentials, because /opt/vyatta/share/vyatta-cfg/templates/system/static-host-mapping/host-name/node.def does not sanitize the 'a

How urgent is CVE-2018-5265?

Priority 52/100. High severity; Public exploit reference

Software pages

Ubiquiti vulnerabilities

Related CVEs

CVE-2017-0935 HIGH 8.8 UPGRADE Ubiquiti Networks EdgeOS version 1.9.1.1 and prior suffer from an Improper Privilege Management vulnerability
CVE-2017-0934 HIGH 8.8 UPGRADE Ubiquiti Networks EdgeOS version 1.9.1 and prior suffer from an Improper Privilege Management vulnerability du
CVE-2017-0933 HIGH 8.0 UPGRADE Ubiquiti Networks EdgeOS version 1.9.1 and prior suffer from a Cross-Site Request Forgery (CSRF) vulnerability
CVE-2017-0932 HIGH 8.8 UPGRADE Ubiquiti Networks EdgeOS version 1.9.1.1 and prior suffer from an Improper Privilege Management vulnerability

References

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