CVE-2020-5686

7.5 highEPSS 1.2%

High (7.5) in nec. EPSS 1.2% chance of exploitation in the next 30 days.

Incorrect implementation of authentication algorithm issue in UNIVERGE SV9500 series from V1 to V7and SV8500 series from S6 to S8 allows an attacker to access the remote system maintenance feature and obtain the information by sending a specially crafted request to a specific URL.

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS: 1.2% chance of exploitation in the next 30 days; higher than 67% of CVEs (scores of 2026-11-01)
CWE: CWE-287
Published: 2021-01-13
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

nec:univerge_sv8500_firmware
nec:univerge_sv9500_firmware

References

https://jvn.jp/en/jp/JVN38784555/index.html
https://www.necplatforms.co.jp/en/press/security_adv.html
https://jvn.jp/en/jp/JVN38784555/index.html
https://www.necplatforms.co.jp/en/press/security_adv.html

Check your stack JSON