How severe is CVE-2018-6186?

CVE-2018-6186 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-6186 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6186?

CVE-2018-6186 affects Citrix Netscaler. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-6186?

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-2018-6186 published?

CVE-2018-6186 was published on 2018-02-01 and last updated on 2026-06-17.

CVE-2018-6186

CVE-2018-6186 is a high-severity vulnerability in Citrix Netscaler with a CVSS 3.x base score of 8.8. 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-918.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-918
Affected product: Citrix Netscaler
Published: 2018-02-01
Last modified: 2026-06-17

Description

Citrix NetScaler VPX through NS12.0 53.13.nc allows an SSRF attack via the /rapi/read_url URI by an authenticated attacker who has a webapp account. The attacker can gain access to the nsroot account, and execute remote commands with root privileges.

Frequently asked questions

What is CVE-2018-6186?: Citrix NetScaler VPX through NS12.0 53.13.nc allows an SSRF attack via the /rapi/read_url URI by an authenticated attacker who has a webapp account. The attacker can gain access to the nsroot account, and execute remote commands with root privileges.
How severe is CVE-2018-6186?: CVE-2018-6186 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-6186 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6186?: CVE-2018-6186 affects Citrix Netscaler. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-6186?: 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-2018-6186 published?: CVE-2018-6186 was published on 2018-02-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:citrix:netscaler:12.0:*:*:*:*:*:*:*

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