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CVE-2026-21916

A UNIX Symbolic Link (Symlink) Following vulnerability in the CLI of Juniper Networks Junos OS allows a local, authenticated attacker with low privileges to escalate their privileges to root which will lead to a complete compromise of the system. When after a user has performed a specific 'file link ...' CLI operation, another user commits (unrelated configuration changes), the first user can login as root. This issue affects Junos OS: * all versions before 23.2R2-S7, * 23.4 versions bef
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:537419c239d99b45cf9d8cde2f9a7e23c9a79634810b338217ed2a36d6905a17
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.3,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/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:e0c5a4844e9b5b7ce9350f6284a59d9e13e614522ccfb93bba97467c39ba2533 · sha256:2d3472817a005294… · /containers/cna/metrics/0/cvssV3_1

{"metric":{"Automatable":"YES","Recovery":"USER","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":7,"baseSeverity":"HIGH","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/AU:Y/R:U/RE:M","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e0c5a4844e9b5b7ce9350f6284a59d9e13e614522ccfb93bba97467c39ba2533 · sha256:2d3472817a005294… · /containers/cna/metrics/1/cvssV4_0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"Junos OS","vendor":"Juniper Networks","versions":[{"lessThan":"23.2R2-S7","status":"affected","version":"0","versionType":"semver"},{"lessThan":"23.4R2-S6","status":"affected","version":"23.4","versionType":"semver"},{"lessThan":"24.2R2-S3","status":"affected","version":"24.2","versionType":"semver"},{"lessThan":"24.4R2-S2","status":"affected","version":"24.4","versionType":"semver"},{"lessThan":"25.2R2","status":"affected","version":"25.2","versionType":"semver"},{"status":"unaffected","version":"25.4R1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e0c5a4844e9b5b7ce9350f6284a59d9e13e614522ccfb93bba97467c39ba2533 · sha256:2d3472817a005294… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.3,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/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:e0c5a4844e9b5b7ce9350f6284a59d9e13e614522ccfb93bba97467c39ba2533 · sha256:2d3472817a005294… · /containers/cna/metrics/0/cvssV3_1
{"metric":{"Automatable":"YES","Recovery":"USER","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":7,"baseSeverity":"HIGH","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/AU:Y/R:U/RE:M","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e0c5a4844e9b5b7ce9350f6284a59d9e13e614522ccfb93bba97467c39ba2533 · sha256:2d3472817a005294… · /containers/cna/metrics/1/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-61","description":"CWE-61 UNIX Symbolic Link (Symlink) Following","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e0c5a4844e9b5b7ce9350f6284a59d9e13e614522ccfb93bba97467c39ba2533 · sha256:2d3472817a005294… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"tags":["vendor-advisory"],"url":"https://kb.juniper.net/JSA107807"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e0c5a4844e9b5b7ce9350f6284a59d9e13e614522ccfb93bba97467c39ba2533 · sha256:2d3472817a005294… · /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.

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