How severe is CVE-2018-0639?

CVE-2018-0639 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-2018-0639 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-0639?

CVE-2018-0639 affects Nec Aterm Hc100rc Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-0639?

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-2018-0639 published?

CVE-2018-0639 was published on 2019-01-09 and last updated on 2026-06-17.

CVE-2018-0639

CVE-2018-0639 is a high-severity vulnerability in Nec Aterm Hc100rc 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-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 9.0
EPSS exploit prediction: 1% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Nec Aterm Hc100rc Firmware
Published: 2019-01-09
Last modified: 2026-06-17

Description

Aterm HC100RC Ver1.0.1 and earlier allows attacker with administrator rights to execute arbitrary OS commands via tools_firmware.cgi date parameter, time parameter, and offset parameter.

Frequently asked questions

What is CVE-2018-0639?: Aterm HC100RC Ver1.0.1 and earlier allows attacker with administrator rights to execute arbitrary OS commands via tools_firmware.cgi date parameter, time parameter, and offset parameter.
How severe is CVE-2018-0639?: CVE-2018-0639 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-2018-0639 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-0639?: CVE-2018-0639 affects Nec Aterm Hc100rc Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-0639?: 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-2018-0639 published?: CVE-2018-0639 was published on 2019-01-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:nec:aterm_hc100rc_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Nec Aterm Hc100rc Firmware

CVE-2018-0641 — High (CVSS 7.2): Buffer overflow in Aterm HC100RC Ver1.0.1 and earlier allows attacker with administrator rights to execute arbitrary…
CVE-2018-0640 — High (CVSS 7.2): Buffer overflow in Aterm HC100RC Ver1.0.1 and earlier allows attacker with administrator rights to execute arbitrary…
CVE-2018-0638 — High (CVSS 7.2): Aterm HC100RC Ver1.0.1 and earlier allows attacker with administrator rights to execute arbitrary OS commands via…
CVE-2018-0637 — High (CVSS 7.2): Aterm HC100RC Ver1.0.1 and earlier allows attacker with administrator rights to execute arbitrary OS commands via…
CVE-2018-0636 — High (CVSS 7.2): Aterm HC100RC Ver1.0.1 and earlier allows attacker with administrator rights to execute arbitrary OS commands via…
CVE-2018-0635 — High (CVSS 7.2): Aterm HC100RC Ver1.0.1 and earlier allows attacker with administrator rights to execute arbitrary OS commands via…

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