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CVE-2026-3869

🗓️ 11 Sep 2026 15:13:18Reported by schneiderType 
cve
 cve
🔗 web.nvd.nist.gov👁 133 Views

Authentication algorithm flaw in PLC when lower application level project runs, causing CIA loss.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-3869
8 Sep 202616:45
–circl
cvelist
Cvelist
CVE-2026-3869
11 Sep 202615:13
–cvelist
euvd
EUVD
EUVD-2026-76132
11 Sep 202615:13
–euvd
nvd
NVD
CVE-2026-3869
11 Sep 202616:17
–nvd
ptsecurity
Positive Technologies
PT-2026-89045
9 Sep 202600:00
–ptsecurity
rapid7
Rapid7 Vulnerability Database (full)
CVE-2026-3869: Incorrect Implementation of Authentication Algorithm
11 Sep 202600:00
–rapid7
vulnrichment
Vulnrichment
CVE-2026-3869
11 Sep 202615:13
–vulnrichment
Vulners
[
  {
    "vendor": "Schneider Electric",
    "product": "Modicon M580",
    "versions": [
      {
        "status": "affected",
        "version": "All versions with an application level below 4.00"
      }
    ],
    "defaultStatus": "unaffected"
  },
  {
    "vendor": "Schneider Electric",
    "product": "Modicon M580 Safety",
    "versions": [
      {
        "status": "affected",
        "version": "All versions with an application level below 4.20"
      }
    ],
    "defaultStatus": "unaffected"
  }
]
SourceLink
downloadwww.download.se.com/files

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18 Sep 2026 19:30Current
5.9Medium risk
Vulners AI Score5.9
CVSS 49.2
EPSS0.00543
SSVC
133