How severe is CVE-2018-0640?

CVE-2018-0640 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-2018-0640 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-0640?

CVE-2018-0640 affects Nec Aterm Hc100rc Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-0640?

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-2018-0640 published?

CVE-2018-0640 was published on 2019-01-09 and last updated on 2026-06-17.

CVE-2018-0640

CVE-2018-0640 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-119.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 6.5
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Nec Aterm Hc100rc Firmware
Published: 2019-01-09
Last modified: 2026-06-17

Description

Buffer overflow in Aterm HC100RC Ver1.0.1 and earlier allows attacker with administrator rights to execute arbitrary code via netWizard.cgi date parameter, time parameter, and offset parameter.

Frequently asked questions

What is CVE-2018-0640?: Buffer overflow in Aterm HC100RC Ver1.0.1 and earlier allows attacker with administrator rights to execute arbitrary code via netWizard.cgi date parameter, time parameter, and offset parameter.
How severe is CVE-2018-0640?: CVE-2018-0640 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-2018-0640 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-0640?: CVE-2018-0640 affects Nec Aterm Hc100rc Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-0640?: 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-2018-0640 published?: CVE-2018-0640 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…
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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…
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