How severe is CVE-2018-11340?

CVE-2018-11340 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-2018-11340 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-11340?

CVE-2018-11340 affects Asustor As6202t Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-11340?

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-2018-11340 published?

CVE-2018-11340 was published on 2018-05-22 and last updated on 2026-06-17.

CVE-2018-11340

CVE-2018-11340 is a high-severity vulnerability in Asustor As6202t 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-434.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 9.0
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Asustor As6202t Firmware
Published: 2018-05-22
Last modified: 2026-06-17

Description

An unrestricted file upload vulnerability in importuser.cgi in ASUSTOR AS6202T ADM 3.1.0.RFQ3 allows attackers to upload supplied data to a specified filename. This can be used to place attacker controlled code on the file system that is then executed.

Frequently asked questions

What is CVE-2018-11340?: An unrestricted file upload vulnerability in importuser.cgi in ASUSTOR AS6202T ADM 3.1.0.RFQ3 allows attackers to upload supplied data to a specified filename. This can be used to place attacker controlled code on the file system that is then executed.
How severe is CVE-2018-11340?: CVE-2018-11340 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-2018-11340 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-11340?: CVE-2018-11340 affects Asustor As6202t Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-11340?: 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-2018-11340 published?: CVE-2018-11340 was published on 2018-05-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:asustor:as6202t_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Asustor As6202t Firmware

CVE-2018-11345 — High (CVSS 8.8): An unrestricted file upload vulnerability in upload.cgi in ASUSTOR AS6202T ADM 3.1.0.RFQ3 allows attackers to upload…
CVE-2018-11341 — High (CVSS 7.2): Directory traversal in importuser.cgi in ASUSTOR AS6202T ADM 3.1.0.RFQ3 allows attackers to navigate the file system…
CVE-2018-11344 — Medium (CVSS 6.5): A path traversal vulnerability in download.cgi in ASUSTOR AS6202T ADM 3.1.0.RFQ3 allows attackers to arbitrarily…
CVE-2018-11346 — Medium (CVSS 4.3): An insecure direct object reference vulnerability in download.cgi in ASUSTOR AS6202T ADM 3.1.0.RFQ3 allows the ability…
CVE-2018-11342 — Medium (CVSS 4.3): A path traversal vulnerability in fileExplorer.cgi in ASUSTOR AS6202T ADM 3.1.0.RFQ3 allows attackers to arbitrarily…

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