How severe is CVE-2020-5685?

CVE-2020-5685 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-5685 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-2020-5685?

CVE-2020-5685 primarily affects Nec Univerge Sv9500 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-5685?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-5685 published?

CVE-2020-5685 was published on 2021-01-13 and last updated on 2026-06-17.

CVE-2020-5685

CVE-2020-5685 is a critical-severity vulnerability in Nec Univerge Sv9500 Firmware with a CVSS 3.x base score of 9.8. 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Nec Univerge Sv9500 Firmware
Published: 2021-01-13
Last modified: 2026-06-17

Description

UNIVERGE SV9500 series from V1 to V7and SV8500 series from S6 to S8 allows an attacker to execute arbitrary OS commands or cause a denial-of-service (DoS) condition by sending a specially crafted request to a specific URL.

Frequently asked questions

What is CVE-2020-5685?: UNIVERGE SV9500 series from V1 to V7and SV8500 series from S6 to S8 allows an attacker to execute arbitrary OS commands or cause a denial-of-service (DoS) condition by sending a specially crafted request to a specific URL.
How severe is CVE-2020-5685?: CVE-2020-5685 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-5685 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-2020-5685?: CVE-2020-5685 primarily affects Nec Univerge Sv9500 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-5685?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-5685 published?: CVE-2020-5685 was published on 2021-01-13 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:nec:univerge_sv9500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:nec:univerge_sv8500_firmware:*:*:*:*:*:*:*:*

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