Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2026-21908

A Use After Free vulnerability was identified in the 802.1X authentication daemon (dot1xd) of Juniper Networks Junos OS and Junos OS Evolved that could allow an authenticated, network-adjacent attacker flapping a port to crash the dot1xd process, leading to a Denial of Service (DoS), or potentially execute arbitrary code within the context of the process running as root. The issue is specific to the processing of a change in authorization (CoA) when a port bounce occurs. A pointer is freed but
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:40869d5ea52a434b8e2b626fccd6f4d9aa928b438ac59158f731ce77da9f4d99
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","product":"Junos OS","vendor":"Juniper Networks","versions":[{"lessThan":"23.2R2-S5","status":"affected","version":"23.2R2-S1","versionType":"semver"},{"lessThan":"23.4R2-S6","status":"affected","version":"23.4R2","versionType":"semver"},{"lessThan":"24.2R2-S3","status":"affected","version":"24.2","versionType":"semver"},{"lessThan":"24.4R2-S1","status":"affected","version":"24.4","versionType":"semver"},{"lessThan":"25.2R1-S2, 25.2R2","status":"affected","version":"25.2","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:66e7419e324f9703f0451a5d612037171d1967886aaa3a22f64f0f42a2cb91df · sha256:9ffb1ffdbbb3be01… · /containers/cna/affected/0

{"defaultStatus":"unaffected","product":"Junos OS Evolved","vendor":"Juniper Networks","versions":[{"lessThan":"23.2R2-S5-EVO","status":"affected","version":"23.2R2-S1","versionType":"semver"},{"lessThan":"23.4R2-S6-EVO","status":"affected","version":"23.4R2","versionType":"semver"},{"lessThan":"24.2R2-S3-EVO","status":"affected","version":"24.2","versionType":"semver"},{"lessThan":"24.4R2-S1-EVO","status":"affected","version":"24.4","versionType":"semver"},{"lessThan":"25.2R1-S2-EVO, 25.2R2-EVO","status":"affected","version":"25.2","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:66e7419e324f9703f0451a5d612037171d1967886aaa3a22f64f0f42a2cb91df · sha256:9ffb1ffdbbb3be01… · /containers/cna/affected/1
cvss · 2 assertions

{"metric":{"attackComplexity":"HIGH","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:66e7419e324f9703f0451a5d612037171d1967886aaa3a22f64f0f42a2cb91df · sha256:9ffb1ffdbbb3be01… · /containers/cna/metrics/0/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"ADJACENT","baseScore":7.5,"baseSeverity":"HIGH","privilegesRequired":"LOW","providerUrgency":"GREEN","subAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/RE:M/U:Green","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImp…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:66e7419e324f9703f0451a5d612037171d1967886aaa3a22f64f0f42a2cb91df · sha256:9ffb1ffdbbb3be01… · /containers/cna/metrics/1/cvssV4_0

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Junos OS","vendor":"Juniper Networks","versions":[{"lessThan":"23.2R2-S5","status":"affected","version":"23.2R2-S1","versionType":"semver"},{"lessThan":"23.4R2-S6","status":"affected","version":"23.4R2","versionType":"semver"},{"lessThan":"24.2R2-S3","status":"affected","version":"24.2","versionType":"semver"},{"lessThan":"24.4R2-S1","status":"affected","version":"24.4","versionType":"semver"},{"lessThan":"25.2R1-S2, 25.2R2","status":"affected","version":"25.2","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:66e7419e324f9703f0451a5d612037171d1967886aaa3a22f64f0f42a2cb91df · sha256:9ffb1ffdbbb3be01… · /containers/cna/affected/0
{"defaultStatus":"unaffected","product":"Junos OS Evolved","vendor":"Juniper Networks","versions":[{"lessThan":"23.2R2-S5-EVO","status":"affected","version":"23.2R2-S1","versionType":"semver"},{"lessThan":"23.4R2-S6-EVO","status":"affected","version":"23.4R2","versionType":"semver"},{"lessThan":"24.2R2-S3-EVO","status":"affected","version":"24.2","versionType":"semver"},{"lessThan":"24.4R2-S1-EVO","status":"affected","version":"24.4","versionType":"semver"},{"lessThan":"25.2R1-S2-EVO, 25.2R2-EVO","status":"affected","version":"25.2","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:66e7419e324f9703f0451a5d612037171d1967886aaa3a22f64f0f42a2cb91df · sha256:9ffb1ffdbbb3be01… · /containers/cna/affected/1

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"HIGH","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:66e7419e324f9703f0451a5d612037171d1967886aaa3a22f64f0f42a2cb91df · sha256:9ffb1ffdbbb3be01… · /containers/cna/metrics/0/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"ADJACENT","baseScore":7.5,"baseSeverity":"HIGH","privilegesRequired":"LOW","providerUrgency":"GREEN","subAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/RE:M/U:Green","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImp…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:66e7419e324f9703f0451a5d612037171d1967886aaa3a22f64f0f42a2cb91df · sha256:9ffb1ffdbbb3be01… · /containers/cna/metrics/1/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-416","description":"CWE-416 Use After Free","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:66e7419e324f9703f0451a5d612037171d1967886aaa3a22f64f0f42a2cb91df · sha256:9ffb1ffdbbb3be01… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["vendor-advisory"],"url":"https://kb.juniper.net/JSA106007"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:66e7419e324f9703f0451a5d612037171d1967886aaa3a22f64f0f42a2cb91df · sha256:9ffb1ffdbbb3be01… · /containers/cna/references/1
{"tags":["vendor-advisory"],"url":"https://supportportal.juniper.net/JSA106007"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:66e7419e324f9703f0451a5d612037171d1967886aaa3a22f64f0f42a2cb91df · sha256:9ffb1ffdbbb3be01… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

← Back to CVE Explorer