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CVE-2026-21905

A Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in the SIP application layer gateway (ALG) of Juniper Networks Junos OS on SRX Series and MX Series with MX-SPC3 or MS-MPC allows an unauthenticated network-based attacker sending specific SIP messages over TCP to crash the flow management process, leading to a Denial of Service (DoS). On SRX Series, and MX Series with MX-SPC3 or MS-MPC service cards, receipt of multiple SIP messages causes the SIP headers to be parsed incor
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:fe04b5a4bf19ee4b6e835fe94d99ded32669d062646b50b1e87a459f7067be7d
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":{"Automatable":"YES","Recovery":"AUTOMATIC","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","providerUrgency":"AMBER","subAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"CONCENTRATED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M/U:Amber","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityIm…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4b54d78d294f74c5e4efaf81f2c8cc721993be05b32619068c871655cba50168 · sha256:4da00991f25a68d5… · /containers/cna/metrics/1/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4b54d78d294f74c5e4efaf81f2c8cc721993be05b32619068c871655cba50168 · sha256:4da00991f25a68d5… · /containers/cna/metrics/0/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","platforms":["SRX Series","MX Series with MX-SPC3","MX Series with MS-MPC"],"product":"Junos OS","vendor":"Juniper Networks","versions":[{"lessThan":"21.2R3-S10","status":"affected","version":"0","versionType":"semver"},{"lessThan":"21.4R3-S12","status":"affected","version":"21.4","versionType":"semver"},{"lessThan":"22.4R3-S8","status":"affected","version":"22.4","versionType":"semver"},{"lessThan":"23.2R2-S5","status":"affected","version":"23.2","versionType":"semver"},{"lessThan":"23.4R2-S6","status":"affected","version":"23.4","versionType":"semver"},{"lessTha…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4b54d78d294f74c5e4efaf81f2c8cc721993be05b32619068c871655cba50168 · sha256:4da00991f25a68d5… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"YES","Recovery":"AUTOMATIC","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","providerUrgency":"AMBER","subAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"CONCENTRATED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M/U:Amber","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityIm…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4b54d78d294f74c5e4efaf81f2c8cc721993be05b32619068c871655cba50168 · sha256:4da00991f25a68d5… · /containers/cna/metrics/1/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4b54d78d294f74c5e4efaf81f2c8cc721993be05b32619068c871655cba50168 · sha256:4da00991f25a68d5… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-835","description":"CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4b54d78d294f74c5e4efaf81f2c8cc721993be05b32619068c871655cba50168 · sha256:4da00991f25a68d5… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["vendor-advisory"],"url":"https://kb.juniper.net/JSA106004"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4b54d78d294f74c5e4efaf81f2c8cc721993be05b32619068c871655cba50168 · sha256:4da00991f25a68d5… · /containers/cna/references/1
{"tags":["vendor-advisory"],"url":"https://supportportal.juniper.net/JSA106004"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4b54d78d294f74c5e4efaf81f2c8cc721993be05b32619068c871655cba50168 · sha256:4da00991f25a68d5… · /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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