CVE-2021-20661

Authenticated file deletion via directory traversal

Published Feb 24, 2021 · Updated Aug 3, 2024

Directory traversal in CONTEC SolarView Compact SV-CPT-MC310 before 6.50 allows remote authenticated users to delete files over an adjacent network. Public advisories do not identify the vulnerable request handler, parameter, or path-normalization error that permits traversal. A user must log in, and deletion can remove arbitrary server files or directories, causing data loss or service interruption.

CVSS severity6.3
Medium
EPSS probability2.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Directory traversal in CONTEC SolarView Compact SV-CPT-MC310 before 6.50 allows remote authenticated users to delete files over an adjacent network. Public advisories do not identify the vulnerable request handler, parameter, or path-normalization error that permits traversal. A user must log in, and deletion can remove arbitrary server files or directories, causing data loss or service interruption.

The record

CVE
CVE-2021-20661
Published
Feb 24, 2021
Updated
Aug 3, 2024
Vendor
CONTEC Co., Ltd.
Product
SolarView Compact
Classifications
CWE-23, T1070.004
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 24, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=SV-CPT-MC310 prior to Ver.6.5

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

CONTEC Co., Ltd. · SolarView Compactversion=SV-CPT-MC310 prior to Ver.6.5

Published CVSS scores

6.3JPCERT/CCCVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
4.1JPCERT/CCAV:A/AC:L/Au:S/C:N/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-23Relative Path Traversal
T1070.004File Deletion

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo