CVE-2020-5686 json
Incorrect implementation of authentication algorithm issue in UNIVERGE SV9500 series from V1 to V7and SV8500 series from S6 to S8 allows an…
published 2021-01-13 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-26845
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 67%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
1.18% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
Affected products
- NEC Corporation UNIVERGE SV9500/SV8500 series
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
necplatforms.co.jp
/en/press/security_adv.html
vendor-advisory
-
jvn.jp
/en/jp/JVN38784555/index.html
third-party-advisory
Sources
- CVE List CVE-2020-5686
- NVD CVE-2020-5686
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