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CVE-2026-21911

🗓️ 15 Jan 2026 20:23:54Reported by juniperType 
cve
 cve
🔗 web.nvd.nist.gov👁 20 Views

Unauthenticated attacker flapping interface halts MAC learning on label switched interfaces.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-21911
15 Jan 202620:23
attackerkb
Circl
CVE-2026-21911
15 Jan 202621:44
circl
CNNVD
Juniper Junos OS Evolved security vulnerabilities
15 Jan 202600:00
cnnvd
Cvelist
CVE-2026-21911 Junos OS Evolved: Flapping management interface causes MAC learning on label-switched interfaces to stop
15 Jan 202620:23
cvelist
EUVD
EUVD-2026-2699
15 Jan 202620:23
euvd
NCSC
Vulnerabilities fixed in Juniper Networks JunOS
16 Jan 202610:07
ncsc
NVD
CVE-2026-21911
15 Jan 202621:16
nvd
OSV
CVE-2026-21911
15 Jan 202621:16
osv
Positive Technologies
PT-2026-3125
15 Jan 202600:00
ptsecurity
RedhatCVE
CVE-2026-21911
16 Jan 202621:33
redhatcve
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[
  {
    "defaultStatus": "unaffected",
    "product": "Junos OS Evolved",
    "vendor": "Juniper Networks",
    "versions": [
      {
        "lessThan": "21.4R3-S7-EVO",
        "status": "affected",
        "version": "0",
        "versionType": "semver"
      },
      {
        "lessThan": "22.2R3-S4-EVO",
        "status": "affected",
        "version": "22.2",
        "versionType": "semver"
      },
      {
        "lessThan": "22.3R3-S3-EVO",
        "status": "affected",
        "version": "22.3",
        "versionType": "semver"
      },
      {
        "lessThan": "22.4R3-S2-EVO",
        "status": "affected",
        "version": "22.4",
        "versionType": "semver"
      },
      {
        "lessThan": "23.2R2-S1-EVO",
        "status": "affected",
        "version": "23.2",
        "versionType": "semver"
      },
      {
        "lessThan": "23.4R1-S2-EVO, 23.4R2-EVO",
        "status": "affected",
        "version": "23.4",
        "versionType": "semver"
      }
    ]
  }
]

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