How severe is CVE-2020-5534?

CVE-2020-5534 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-5534 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5534?

CVE-2020-5534 affects Nec Aterm Wg2600hs Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-5534?

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-2020-5534 published?

CVE-2020-5534 was published on 2020-02-21 and last updated on 2026-06-17.

CVE-2020-5534

CVE-2020-5534 is a high-severity vulnerability in Nec Aterm Wg2600hs Firmware with a CVSS 3.x base score of 8.0. 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 8.0)
CVSS v2: 7.7
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Nec Aterm Wg2600hs Firmware
Published: 2020-02-21
Last modified: 2026-06-17

Description

Aterm WG2600HS firmware Ver1.3.2 and earlier allows an authenticated attacker on the same network segment to execute arbitrary OS commands with root privileges via unspecified vectors.

Frequently asked questions

What is CVE-2020-5534?: Aterm WG2600HS firmware Ver1.3.2 and earlier allows an authenticated attacker on the same network segment to execute arbitrary OS commands with root privileges via unspecified vectors.
How severe is CVE-2020-5534?: CVE-2020-5534 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-5534 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5534?: CVE-2020-5534 affects Nec Aterm Wg2600hs Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-5534?: 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-2020-5534 published?: CVE-2020-5534 was published on 2020-02-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:nec:aterm_wg2600hs_firmware:*:*:*:*:*:*:*:*

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