{"answers":{"affected":"It affects 3 products.","exploited":"Yes. Attackers have exploited CVE-2021-22681 in the wild since at least 5 Mar 2026.","fix":"No fix has been published for CVE-2021-22681 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 26 Mar 2026.","what":"CVE-2021-22681 is a critical authentication bypass vulnerability in Rockwell Automation Studio 5000 Logix Designer, RSLogix 5000, Logix Controllers, published on 3 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-22681 and fix it if it is affected.\n\nWhat it is: CVE-2021-22681 is a critical authentication bypass vulnerability in Rockwell Automation Studio 5000 Logix Designer, RSLogix 5000, Logix Controllers, published on 3 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2021-22681 in the wild since at least 5 Mar 2026.\n\nAffected product: Rockwell Automation Studio 5000 Logix Designer, RSLogix 5000, Logix Controllers. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2021-22681/ (Markdown: https://insights.sbomify.com/CVE-2021-22681/index.md)","id":"CVE-2021-22681","markdown":"https://insights.sbomify.com/CVE-2021-22681/index.md","name":"CVE-2021-22681","record":{"aliases":["GHSA-pvh9-p4pw-h78q"],"analysis":{"component_type":"ics_ot","fix_type":"patch","impacts":["privilege_escalation","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"PLC programming software","requires_auth":"none","summary":"An unauthenticated attacker can bypass verification mechanisms to authenticate with Rockwell Automation Logix controllers, potentially gaining unauthorized control.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"icscert","cpe":[{"product":"factorytalk_services_platform","vendor":"rockwellautomation"},{"product":"rslogix_5000","vendor":"rockwellautomation"},{"product":"studio_5000_logix_designer","vendor":"rockwellautomation"}],"cvss":{"score":9.8,"severity":"critical","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-522","name":"Insufficiently Protected Credentials"}],"description":"Rockwell Automation Studio 5000 Logix Designer Versions 21 and later, and RSLogix 5000 Versions 16 through 20 use a key to verify Logix controllers are communicating with Rockwell Automation CompactLogix 1768, 1769, 5370, 5380, 5480: ControlLogix 5550, 5560, 5570, 5580; DriveLogix 5560, 5730, 1794-L34; Compact GuardLogix 5370, 5380; GuardLogix 5570, 5580; SoftLogix 5800. Rockwell Automation Studio 5000 Logix Designer Versions 21 and later and RSLogix 5000: Versions 16 through 20 are vulnerable because an unauthenticated attacker could bypass this verification mechanism and authenticate with Rockwell Automation CompactLogix 1768, 1769, 5370, 5380, 5480: ControlLogix 5550, 5560, 5570, 5580; DriveLogix 5560, 5730, 1794-L34; Compact GuardLogix 5370, 5380; GuardLogix 5570, 5580; SoftLogix 5800.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-07-31","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-07-31T19:05:11Z","kind":"github_poc","ref":"https://github.com/pcrosby-1990/cip-security-poc","stars":0,"title":"▎ Open, runnable proof of concept + IEC 62443-4-2 (SL 2) mapping + a phased rollout for CVE-2021-22681 — the unpatchable Rockwell Logix hardcoded-key flaw behind the 2026 water-sector attacks. Reproduces the fix principle with open tooling; sized for small water utilities."}],"tier":"exploited"},"has_fix":null,"headline":"Rockwell Multiple Products Insufficient Protected Credentials","id":"CVE-2021-22681","indexable":true,"kev":{"dateAdded":"2026-03-05","dueDate":"2026-03-26","knownRansomwareCampaignUse":"Unknown","product":"Multiple Products","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","vendorProject":"Rockwell","vulnerabilityName":"Rockwell Multiple Products Insufficient Protected Credentials Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Privilege escalation in Cscape","id":"CVE-2021-22682"},"packages":[],"prev":{"headline":"NXP MQX Integer Overflow or Wraparound","id":"CVE-2021-22680"},"products":["Rockwell Automation Studio 5000 Logix Designer, RSLogix 5000, Logix Controllers"],"published":"2021-03-03","related":[{"cvss_score":10,"headline":"Weak cryptography in Rockwell Automation FactoryTalk Services Platform","id":"CVE-2020-14516","kev_date_added":null,"published":"2021-03-18"},{"cvss_score":9.8,"headline":"Rockwell Automation FactoryTalk® Service Platform Service Token Vulnerability","id":"CVE-2024-21917","kev_date_added":null,"published":"2024-01-31"},{"cvss_score":9.8,"headline":"Deserialization in Rockwell Automation All versions of FactoryTalk Diagnostics software, a subsystem of the FactoryTalk Services Platform","id":"CVE-2020-6967","kev_date_added":null,"published":"2020-03-23"},{"cvss_score":9,"headline":"Rockwell Automation FactoryTalk® Service Platform Elevated Privileges Vulnerability Through Web Service Functionality","id":"CVE-2024-21915","kev_date_added":null,"published":"2024-02-16"},{"cvss_score":8.8,"headline":"Missing authorization in Rockwell Automation FactoryTalk Services Platform","id":"CVE-2020-12033","kev_date_added":null,"published":"2020-06-23"},{"cvss_score":8.5,"headline":"Rockwell Automation FactoryTalk Services Platform Protection Mechanism Failure","id":"CVE-2021-32960","kev_date_added":null,"published":"2022-04-01"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"open","licence":"CC0 1.0","name":"CISA KEV"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"active","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-03-06","vendors":["n/a"]},"summary":"An unauthenticated attacker can bypass verification mechanisms to authenticate with Rockwell Automation Logix controllers, potentially gaining unauthorized control.","url":"https://insights.sbomify.com/CVE-2021-22681/"}