How severe is CVE-2018-11509?

CVE-2018-11509 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-11509 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-11509?

CVE-2018-11509 affects Asustor Asustor Data Master. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-11509?

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

When was CVE-2018-11509 published?

CVE-2018-11509 was published on 2018-08-16 and last updated on 2026-06-17.

CVE-2018-11509

CVE-2018-11509 is a critical-severity vulnerability in Asustor Asustor Data Master with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 13% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-798.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 13% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
Affected product: Asustor Asustor Data Master
Published: 2018-08-16
Last modified: 2026-06-17

Description

ASUSTOR ADM 3.1.0.RFQ3 uses the same default root:admin username and password as it does for the NAS itself for applications that are installed from the online repository. This may allow an attacker to login and upload a webshell.

Frequently asked questions

What is CVE-2018-11509?: ASUSTOR ADM 3.1.0.RFQ3 uses the same default root:admin username and password as it does for the NAS itself for applications that are installed from the online repository. This may allow an attacker to login and upload a webshell.
How severe is CVE-2018-11509?: CVE-2018-11509 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-11509 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-11509?: CVE-2018-11509 affects Asustor Asustor Data Master. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-11509?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-11509 published?: CVE-2018-11509 was published on 2018-08-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:asustor:asustor_data_master:3.1.0:*:*:*:*:*:*:*

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