CVE-2020-10620Network attack vector

Service interruption via unauthenticated management commands

Published May 14, 2020 · Updated Aug 4, 2024

Improper authorization in Opto 22 SoftPAC Project 9.6 and earlier allows remote attackers to stop the control service over the network. The SoftPAC Agent accepts management commands on TCP port 22000 without credentials or authentication, so clients can impersonate SoftPAC Monitor. Network access to the listening service is sufficient, and stopping SoftPAC interrupts the running control strategy.

CVSS severity9.8
Critical
EPSS probability1.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Opto 22 SoftPAC Project 9.6 and earlier allows remote attackers to stop the control service over the network. The SoftPAC Agent accepts management commands on TCP port 22000 without credentials or authentication, so clients can impersonate SoftPAC Monitor. Network access to the listening service is sufficient, and stopping SoftPAC interrupts the running control strategy.

The record

CVE
CVE-2020-10620
Published
May 14, 2020
Updated
Aug 4, 2024
Vendor
Opto 22
Product
SoftPAC
Classifications
CWE-285, CWE-862, T0814
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 14, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=SoftPAC Project Version 9.6 and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Opto 22 · SoftPACversion=SoftPAC Project Version 9.6 and prior

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-285Improper Authorization
CWE-862Missing Authorization
T0814Denial of Service

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

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Your stack

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