How severe is CVE-2018-12591?

CVE-2018-12591 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-12591 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-12591?

CVE-2018-12591 affects Ubnt Edgeswitch Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-12591?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-12591 published?

CVE-2018-12591 was published on 2018-06-20 and last updated on 2026-06-17.

CVE-2018-12591

CVE-2018-12591 is a high-severity vulnerability in Ubnt Edgeswitch Firmware with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 9.0
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Ubnt Edgeswitch Firmware
Published: 2018-06-20
Last modified: 2026-06-17

Description

Ubiquiti Networks EdgeSwitch version 1.7.3 and prior suffer from an improperly neutralized element in an OS command 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 shell instructions.

Frequently asked questions

What is CVE-2018-12591?: Ubiquiti Networks EdgeSwitch version 1.7.3 and prior suffer from an improperly neutralized element in an OS command 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 shell instructions.
How severe is CVE-2018-12591?: CVE-2018-12591 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-12591 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-12591?: CVE-2018-12591 affects Ubnt Edgeswitch Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-12591?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-12591 published?: CVE-2018-12591 was published on 2018-06-20 and last updated on 2026-06-17.

References

https://hackerone.com/reports/313245

Affected products (1)

cpe:2.3:o:ubnt:edgeswitch_firmware:*:*:*:*:*:*:*:*

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