CVE-2018-12590: Ubiquiti Networks EdgeSwitch version 1.7.3 and prior suffer from an externally controlled format-string vulner

Q: How do I fix CVE-2018-12590?

edgeswitch firmware: upgrade to newer than 1.7.3. Exact commands for each OS are on this page.

Q: Is CVE-2018-12590 being exploited?

CVE-2018-12590 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-2018-12590 affect?

CVE-2018-12590 affects edgeswitch firmware. Severity is high (CVSS 7.2). Ubiquiti Networks EdgeSwitch version 1.7.3 and prior suffer from an externally controlled format-string vulnerability due to lack of protection on the admin CLI, leading to code execution and privilege escalation greater than administrators

This month

HIGH 7.2UPGRADE

CVE-2018-12590 is a high-severity flaw (CVSS 7.2) affecting edgeswitch firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Ubiquiti Networks EdgeSwitch version 1.7.3 and prior suffer from an externally controlled format-string vulnerability due to lack of protection on the admin CLI, leading to code execution and privilege escalation greater than administrators themselves are allowed. An attacker with access to an admin account could escape the restricted CLI and execute arbitrary code.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-134
Published	2018-06-20
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

2018-06-20 12:29 UTCPublished CVE record published
2026-06-17 01:38 UTCUpdated Record last modified

ui edgeswitch firmware UPGRADE

Affected: <= 1.7.3

Fixed in: newer than 1.7.3

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 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-2018-12590?

edgeswitch firmware: upgrade to newer than 1.7.3. Exact commands for each OS are on this page.

Is CVE-2018-12590 being exploited?

CVE-2018-12590 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-2018-12590 affect?

CVE-2018-12590 affects edgeswitch firmware. Severity is high (CVSS 7.2). Ubiquiti Networks EdgeSwitch version 1.7.3 and prior suffer from an externally controlled format-string vulnerability due to lack of protection on the admin CLI, leading to code execution and privilege escalation greater than administrators

How urgent is CVE-2018-12590?

Priority 44/100. High severity

Software pages

Ubiquiti vulnerabilities

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CVE-2018-12591 HIGH 7.2 UPGRADE Ubiquiti Networks EdgeSwitch version 1.7.3 and prior suffer from an improperly neutralized element in an OS co

References

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