CVE 2021-22681 https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.PN1550.html and send a specially crafted
CVE 2021-22681 https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.PN1550.html and send a specially crafted CIP message to the device. If exploited, a threat actor could help prevent access to the legitimate user and end connections to connected devices including the workstation. To recover the controllers, a download is required which ends any process that the controller is running.
- Published
- Oct 14, 2024
- Updated
- Jun 17, 2026
- EPSS
- 0.6% · 44th percentile
- CWE
- CWE-20
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Report tools
Action score
34
Monitor
Low priority for now.
- CVSS
- 34 / 40 · 8.7 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.6%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · Rockwell
- 8.7
- NVD has not scored this yet; the score shown is the CNA’s.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| rockwellautomation | controllogix 5580 firmware | cpe:2.3:o:rockwellautomation:controllogix_5580_firmware |
| rockwellautomation | controllogix 5580 | cpe:2.3:h:rockwellautomation:controllogix_5580 |
| rockwellautomation | controllogix 5580 process firmware | cpe:2.3:o:rockwellautomation:controllogix_5580_process_firmware |
| rockwellautomation | controllogix 5580 process | cpe:2.3:h:rockwellautomation:controllogix_5580_process |
| rockwellautomation | guardlogix 5580 firmware | cpe:2.3:o:rockwellautomation:guardlogix_5580_firmware |
| rockwellautomation | guardlogix 5580 | cpe:2.3:h:rockwellautomation:guardlogix_5580 |
| rockwellautomation | compactlogix 5380 firmware | cpe:2.3:o:rockwellautomation:compactlogix_5380_firmware |
| rockwellautomation | compactlogix 5380 | cpe:2.3:h:rockwellautomation:compactlogix_5380 |
| rockwellautomation | compact guardlogix 5380 sil 2 firmware | cpe:2.3:o:rockwellautomation:compact_guardlogix_5380_sil_2_firmware |
| rockwellautomation | compact guardlogix 5380 sil 2 | cpe:2.3:h:rockwellautomation:compact_guardlogix_5380_sil_2 |
| rockwellautomation | compact guardlogix 5380 sil 3 firmware | cpe:2.3:o:rockwellautomation:compact_guardlogix_5380_sil_3_firmware |
| rockwellautomation | compact guardlogix 5380 sil 3 | cpe:2.3:h:rockwellautomation:compact_guardlogix_5380_sil_3 |
and 4 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- rockwellautomation compact guardlogix 5380 sil 2 firmware31.011 and later · before 33.017
- rockwellautomation compact guardlogix 5380 sil 2 firmware34.011 and later · before 34.014
- rockwellautomation compact guardlogix 5380 sil 2 firmware35.011 and later · before 35.013
- rockwellautomation compact guardlogix 5380 sil 3 firmware35.011 and later · before 35.013
- rockwellautomation compact guardlogix 5380 sil 3 firmware34.011 and later · before 34.014
- rockwellautomation compact guardlogix 5380 sil 3 firmware32.013 and later · before 33.017
- rockwellautomation compactlogix 5380 firmware34.011 and later · before 34.014
- rockwellautomation compactlogix 5380 firmware35.011 and later · before 35.013
- rockwellautomation compactlogix 5380 firmware28.011 and later · before 33.017
- rockwellautomation compactlogix 5480 firmware35.011 and later · before 35.013
- rockwellautomation compactlogix 5480 firmware34.011 and later · before 34.014
- rockwellautomation compactlogix 5480 firmware32.011 and later · before 33.017
- rockwellautomation controllogix 5580 firmware28.011 and later · before 33.017
- rockwellautomation controllogix 5580 firmware34.011 and later · before 34.014
- rockwellautomation controllogix 5580 firmware35.011 and later · before 35.013
- rockwellautomation controllogix 5580 process firmware35.011 and later · before 35.013
- rockwellautomation controllogix 5580 process firmware33.011 and later · before 33.017
- rockwellautomation controllogix 5580 process firmware34.011 and later · before 34.014
- rockwellautomation factorytalk logix echo firmware35.011 and later · before 35.013
- rockwellautomation factorytalk logix echo firmware33.011 and later · before 34.014
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Rockwell). Independent of NVD's CPE analysis and usually ahead of it.
Rockwell Automation Compact GuardLogix 5380 SIL 2
- V31.011affected
Rockwell Automation Compact GuardLogix 5380 SIL 3
- V32.013affected
Rockwell Automation CompactLogix 5380
- V28.011affected
Rockwell Automation CompactLogix 5480
- V32.011affected
Rockwell Automation ControlLogix® 5580
- V28.011affected
Rockwell Automation ControlLogix® 5580 Process
- V33.011affected
Rockwell Automation FactoryTalk® Logix Echo
- V33.011affected
Rockwell Automation GuardLogix 5580
- V31.011affected
Same product
rockwellautomation: all recordsOther highest-scoring records for the same primary product.
- CVE-2024-40619Rockwell Automation GuardLogix/ControlLogix 5580 Controller denial-of-service Vulnerability via Malformed Packet Handling34Monitor
- CVE-2024-5659Rockwell Automation Multicast Request Causes major nonrecoverable fault on Select Controllers33Monitor
- CVE-2025-9166Rockwell Automation ControlLogix® 5580 V35.013 Denial-Of-Service32Monitor
- CVE-2024-3493Rockwell Automation ControlLogix and GaurdLogix Vulnerable to Major Nonrecoverable Fault Due to Invalid Header Value30Monitor
- CVE-2022-1159Rockwell Automation Studio 5000 Logix Designer Code Injection29Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2024-3493182 days apartRockwell Automation ControlLogix and GaurdLogix Vulnerable to Major Nonrecoverable Fault Due to Invalid Header Value30Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-24-1694 · Oct 15, 2024(Rockwell Automation Çoklu Ürün Güvenlik Bildirimi)
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- Integrity
- Availability
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- X
Weakness class (CWE)
CWE-20 · Improper Input ValidationCVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Server Side Include (SSI) InjectionCAPEC-101likelihood: High · High
- Cross Zone ScriptingCAPEC-104likelihood: Medium · High
- Command Line Execution through SQL InjectionCAPEC-108likelihood: Low · Very High
- Object Relational Mapping InjectionCAPEC-109likelihood: Low · High
- SQL Injection through SOAP Parameter TamperingCAPEC-110likelihood: High · Very High
- Double EncodingCAPEC-120likelihood: Low · Medium
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
ATT&CK techniques
- Obfuscated Files or InformationT1027
- Masquerading: Invalid Code SignatureT1036.001
- Steal Web Session CookieT1539
- Subvert Trust Controls: Code SigningT1553.002
- Impair Defenses:Impair Command History LoggingT1562.003
- Hijack Execution Flow:Dynamic Linker HijackingT1574.006
- Hijack Execution Flow:Path Interception by PATH Environment VariableT1574.007
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.