How severe is CVE-2018-14942?

CVE-2018-14942 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-2018-14942 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-14942?

CVE-2018-14942 affects Harmonicinc Nsg 9000 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-14942?

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-2018-14942 published?

CVE-2018-14942 was published on 2018-08-05 and last updated on 2026-06-17.

CVE-2018-14942

CVE-2018-14942 is a high-severity vulnerability in Harmonicinc Nsg 9000 Firmware 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-22.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 4.0
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Harmonicinc Nsg 9000 Firmware
Published: 2018-08-05
Last modified: 2026-06-17

Description

Harmonic NSG 9000 devices allow remote authenticated users to conduct directory traversal attacks, as demonstrated by "POST /PY/EMULATION_GET_FILE" or "POST /PY/EMULATION_EXPORT" with FileName=../../../passwd in the POST data.

Frequently asked questions

What is CVE-2018-14942?: Harmonic NSG 9000 devices allow remote authenticated users to conduct directory traversal attacks, as demonstrated by "POST /PY/EMULATION_GET_FILE" or "POST /PY/EMULATION_EXPORT" with FileName=../../../passwd in the POST data.
How severe is CVE-2018-14942?: CVE-2018-14942 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-2018-14942 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-14942?: CVE-2018-14942 affects Harmonicinc Nsg 9000 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-14942?: 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-2018-14942 published?: CVE-2018-14942 was published on 2018-08-05 and last updated on 2026-06-17.

References

https://github.com/pudding2/NSG9000/blob/master/exp.txt

Affected products (1)

cpe:2.3:o:harmonicinc:nsg_9000_firmware:-:*:*:*:*:*:*:*

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