7.5
HIGH
CVE-2020-5686
UNIVERGE SV9500/SV8500 Authentication Bypass
Description

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.

INFO

Published Date :

Jan. 13, 2021, 10:15 a.m.

Last Modified :

Jan. 21, 2021, 6:08 p.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2020-5686 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Nec univerge_sv9500_firmware
2 Nec univerge_sv8500_firmware
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2020-5686.

URL Resource
https://jvn.jp/en/jp/JVN38784555/index.html Third Party Advisory
https://www.necplatforms.co.jp/en/press/security_adv.html Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-5686 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-5686 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Jan. 21, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:N/A:N)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    Changed Reference Type https://jvn.jp/en/jp/JVN38784555/index.html No Types Assigned https://jvn.jp/en/jp/JVN38784555/index.html Third Party Advisory
    Changed Reference Type https://www.necplatforms.co.jp/en/press/security_adv.html No Types Assigned https://www.necplatforms.co.jp/en/press/security_adv.html Vendor Advisory
    Added CWE NIST CWE-287
    Added CPE Configuration AND OR *cpe:2.3:o:nec:univerge_sv9500_firmware:*:*:*:*:*:*:*:* versions from (including) v1 up to (including) v7 OR cpe:2.3:h:nec:univerge_sv9500:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:nec:univerge_sv8500_firmware:*:*:*:*:*:*:*:* versions from (including) s6 up to (including) s8 OR cpe:2.3:h:nec:univerge_sv8500:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-5686 is associated with the following CWEs:

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.17 }} 0.02%

score

0.54182

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
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Scope
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