CVE-2021-20657

Improper access control vulnerability in SolarView Compact SV-CPT-MC310 prior to Ver.6.5 allows...

5.4 Medium

Improper access control vulnerability in SolarView Compact SV-CPT-MC310 prior to Ver.6.5 allows an authenticated attacker to obtain and/or alter the setting information without the access privilege via unspecified vectors.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: None

Exploit likelihood

2.83%Up 2.0 points since Apr 14, 2021

What each source reports

NVD Score used 5.4

Record: CVE-2021-20657
CVSS 3.1: 5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS 2.0: 5.5 MediumAV:N/AC:L/Au:S/C:P/I:P/A:N
Updated: 2026-11-02

CVE List No score

Record: CVE-2021-20657
Updated: 2026-11-02

EUVDEUVD-2021-8075 No score

Record: EUVD-2021-8075
Updated: 2026-11-03

GitHub AdvisoriesGHSA-hrv3-fv5c-h4m4 5.4

Improper access control vulnerability in SolarView Compact SV-CPT-MC310 prior to Ver.6.5 allows...

Record: GHSA-hrv3-fv5c-h4m4
CVSS 3.1: 5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weakness: CWE-863
Updated: 2026-11-02

Affected products

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-20657 is a medium vulnerability (CVSS 5.4) in Contec Co., Ltd. Solarview Compact, published February 24, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.83%, the 86th percentile. No source names a fixed version.