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CVE-2026-21903

🗓️ 15 Jan 2026 20:18:36Reported by juniperType 
cve
 cve
🔗 web.nvd.nist.gov👁 13 Views

CVE-2026-21903: Junos OS pfe stack overflow causes DoS and FPC crash on telemetry sensor subscriptions; authenticated, low privileges.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-21903
15 Jan 202620:18
attackerkb
CNNVD
Juniper Networks Junos OS security vulnerabilities
15 Jan 202600:00
cnnvd
Cvelist
CVE-2026-21903 Junos OS: Subscribing to telemetry sensors at scale causes all FPCs to crash
15 Jan 202620:18
cvelist
EUVD
EUVD-2026-2692
15 Jan 202620:18
euvd
NCSC
Vulnerabilities fixed in Juniper Networks JunOS
16 Jan 202610:07
ncsc
NVD
CVE-2026-21903
15 Jan 202621:16
nvd
OSV
CVE-2026-21903
15 Jan 202621:16
osv
Positive Technologies
PT-2026-3118
15 Jan 202600:00
ptsecurity
RedhatCVE
CVE-2026-21903
16 Jan 202621:33
redhatcve
Vulnrichment
CVE-2026-21903 Junos OS: Subscribing to telemetry sensors at scale causes all FPCs to crash
15 Jan 202620:18
vulnrichment
Rows per page
NVD
Vulners
Node
juniperjunosRange<22.4
OR
juniperjunosMatch22.4-
OR
juniperjunosMatch22.4r1
OR
juniperjunosMatch22.4r1-s1
OR
juniperjunosMatch22.4r1-s2
OR
juniperjunosMatch22.4r2
OR
juniperjunosMatch22.4r2-s1
OR
juniperjunosMatch22.4r2-s2
OR
juniperjunosMatch22.4r3
OR
juniperjunosMatch22.4r3-s1
OR
juniperjunosMatch22.4r3-s2
OR
juniperjunosMatch22.4r3-s3
OR
juniperjunosMatch22.4r3-s4
OR
juniperjunosMatch22.4r3-s5
OR
juniperjunosMatch22.4r3-s6
OR
juniperjunosMatch23.2-
OR
juniperjunosMatch23.2r1
OR
juniperjunosMatch23.2r1-s1
OR
juniperjunosMatch23.2r1-s2
OR
juniperjunosMatch23.2r2
OR
juniperjunosMatch23.2r2-s1
OR
juniperjunosMatch23.2r2-s2
OR
juniperjunosMatch23.2r2-s3
OR
juniperjunosMatch23.4-
OR
juniperjunosMatch23.4r1
OR
juniperjunosMatch23.4r1-s1
OR
juniperjunosMatch23.4r1-s2
[
  {
    "defaultStatus": "unaffected",
    "product": "Junos OS",
    "vendor": "Juniper Networks",
    "versions": [
      {
        "lessThan": "22.4R3-S7",
        "status": "affected",
        "version": "0",
        "versionType": "semver"
      },
      {
        "lessThan": "23.2R2-S4",
        "status": "affected",
        "version": "23.2",
        "versionType": "semver"
      },
      {
        "lessThan": "23.4R2",
        "status": "affected",
        "version": "23.4",
        "versionType": "semver"
      }
    ]
  }
]

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17 Jun 2026 10:19Current
6.5Medium risk
Vulners AI Score6.5
CVSS 3.16.5
CVSS 47.1
EPSS0.0036
SSVC
13