CVE-2021-43989Network attack vector

Password recovery via weak MD5 hashing

Published Dec 23, 2021 · Updated Sep 16, 2024

Weak password hashing in mySCADA Technologies myPRO 8.20.0 and earlier allows attackers to crack previously retrieved password hashes. The password storage mechanism applies MD5 without sufficient computational effort, so captured hashes can be tested rapidly offline. Exploitation requires prior access to stored password hashes and exposes the corresponding passwords without changing system data.

CVSS severity7.5
High
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak password hashing in mySCADA Technologies myPRO 8.20.0 and earlier allows attackers to crack previously retrieved password hashes. The password storage mechanism applies MD5 without sufficient computational effort, so captured hashes can be tested rapidly offline. Exploitation requires prior access to stored password hashes and exposes the corresponding passwords without changing system data.

The record

CVE
CVE-2021-43989
Published
Dec 23, 2021
Updated
Sep 16, 2024
Vendor
mySCADA Technologies
Product
myPRO
Classifications
CWE-916, CWE-327, T1110.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 23, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=All <=8.20.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

mySCADA Technologies · myPROversion=All <=8.20.0

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-916Use of Password Hash With Insufficient Computational Effort
CWE-327Use of a Broken or Risky Cryptographic Algorithm
T1110.002Password Cracking

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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