CVE-2021-32978
HIGHDescription
The programming protocol allows for a previously entered password and lock state to be read by an attacker. If the previously entered password was successful, the attacker can then use the password to unlock Automation Direct CLICK PLC CPU Modules: C0-1x CPUs with firmware prior to v3.00.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Exploit Intelligence
Moderate risk: more likely to be exploited than 59% of all known CVEs.
References
Related Vulnerabilities
Other CWE-256 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-28736 | High | 7.1 | 2.5% | - | - |
| CVE-2019-10921 | High | 7.5 | 2.4% | - | Fix |
| CVE-2017-16714 | Critical | 9.8 | 2.4% | - | Fix |
| CVE-2024-26165 | High | 8.8 | 1.9% | - | Fix |
| CVE-2020-8183 | High | 7.5 | 1.9% | - | Fix |
| CVE-2020-6961 | Critical | 10.0 | 1.6% | - | - |
Common questions
How do I fix CVE-2021-32978?
Published advisories record a fix for 20 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.
Is CVE-2021-32978 being actively exploited?
Not that we know of. CVE-2021-32978 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.99% is the estimated probability that it will be exploited in the next 30 days. That is higher than 59% of all scored CVEs.
How severe is CVE-2021-32978?
CVE-2021-32978 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2021-32978 affect?
Published advisories record a fix for c0-10are-d firmware (NVD), c0-10dd1e-d firmware (NVD), c0-10dd2e-d firmware (NVD), c0-10dre-d firmware (NVD), and 16 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.