Controllogix 5550 vulnerabilitiesAnd the versions its exploited flaws hit.
Controllogix 5550 is made by Rockwellautomation. We track 2 published vulnerabilities listed under that exact name, across 0 versions. 1 of them is on the list of flaws known to be exploited, the newest added on 5 March 2026. Rockwellautomation lists newer releases under their own names, such as Controllogix 5550 Firmware, so check those pages too.
The most recent Controllogix 5550 flaw added to the known-exploited list is CVE-2021-22681, on 5 March 2026. We keep watching the known-exploited list.
Is Controllogix 5550 listed under other names? Yes.
Rockwellautomation also lists Controllogix 5550 under more specific names, such as Controllogix 5550 Firmware. Flaws listed only under those names are counted on their own pages, not here. If you run one of these, open its page for its own exploited flaws.
Which versions of Controllogix 5550 do the exploited flaws hit?
Each exploited flaw lists the versions it affects, as published by the vendor. Find your version, then patch.
Which Controllogix 5550 vulnerabilities are being exploited?
1 flaw is on the government list of vulnerabilities known to be exploited. These are the ones criminals are using now, so they go first, whatever their severity score says.
- 9.8Rockwell Multiple Products Insufficient Protected Credentials Vulnerability
Multiple Rockwell products contain an insufficient protected credentials vulnerability.
Which Controllogix 5550 flaws are most likely to be used?
Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- 5.2%CVE-2022-1161Critical
An attacker with the ability to modify a user program may change user program code on some ControlLogix, CompactLogix, and GuardLogix Control systems.
Running Controllogix 5550? We'll keep checking.
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1 flaw being exploited affects software Acme tracks
Multiple Rockwell products contain an insufficient protected credentials vulnerability. Studio 5000 Logix Designer software may allow a key to be discovered. This key is used to verify Logix controllers are communicating with Rockwell Automation design software. If successfully exploited, this vulnerability could allow an unauthorized application to connect with Logix controllers. To leverage this vulnerability, an unauthorized user would require network access to the controller.
- Matched to
- Controllogix 5550 on Acme's software list
- What to do
- Patch first, then check for signs of use
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
We track 2 published vulnerabilities listed under the name Controllogix 5550, across 0 versions. The most recent Controllogix 5550 flaw added to the known-exploited list is CVE-2021-22681, on 5 March 2026.
1 is on the list of flaws known to be exploited. The most recently added is CVE-2021-22681.
Rockwellautomation also lists Controllogix 5550 under more specific names, such as Controllogix 5550 Firmware. Flaws listed only under those names are counted on their own pages, not here. Open the release you run to see its own list.
Create a Precursor Intelligence account and track Controllogix 5550. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.