How severe is CVE-2018-6940?

CVE-2018-6940 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2018-6940 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6940?

CVE-2018-6940 affects Nat32. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-6940?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-6940 published?

CVE-2018-6940 was published on 2018-02-20 and last updated on 2026-06-17.

CVE-2018-6940

CVE-2018-6940 is a medium-severity vulnerability in Nat32 with a CVSS 3.x base score of 6.1. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Nat32
Published: 2018-02-20
Last modified: 2026-06-17

Description

A /shell?cmd= XSS issue exists in the HTTPD component of NAT32 v2.2 Build 22284 devices that can be exploited for Remote Code Execution in conjunction with CSRF.

Frequently asked questions

What is CVE-2018-6940?: A /shell?cmd= XSS issue exists in the HTTPD component of NAT32 v2.2 Build 22284 devices that can be exploited for Remote Code Execution in conjunction with CSRF.
How severe is CVE-2018-6940?: CVE-2018-6940 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2018-6940 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6940?: CVE-2018-6940 affects Nat32. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-6940?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-6940 published?: CVE-2018-6940 was published on 2018-02-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nat32:nat32:2.2:*:*:*:*:*:*:*

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