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CVE-2026-40139

A critical pre-authentication vulnerability exists in the authentication subsystem of BeyondTrust Remote Support. Improper processing of authentication requests may allow an unauthenticated remote attacker to bypass access controls and gain unauthorized access to the appliance, including accounts with elevated privileges. Exploitation requires a specific authentication configuration to be enabled.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:fa7df5daa3d39fecbf67252249936f729ebc37d8f533ae7412df097d9ba0febf
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","product":"Remote Support","vendor":"BeyondTrust","versions":[{"lessThanOrEqual":"25.3.2","status":"affected","version":"0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:72fa6f2afcf8ae68a5a4c3965a356de4a1c64e63f2e4acae7e76939f17385c70 · sha256:0bcdde05482c5508… · /containers/cna/affected/0

{"defaultStatus":"unaffected","product":"Privileged Remote Access","vendor":"BeyondTrust","versions":[{"lessThanOrEqual":"25.3.2","status":"affected","version":"0","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:72fa6f2afcf8ae68a5a4c3965a356de4a1c64e63f2e4acae7e76939f17385c70 · sha256:0bcdde05482c5508… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","product":"Remote Support","vendor":"BeyondTrust","versions":[{"lessThanOrEqual":"25.3.2","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:72fa6f2afcf8ae68a5a4c3965a356de4a1c64e63f2e4acae7e76939f17385c70 · sha256:0bcdde05482c5508… · /containers/cna/affected/0
{"defaultStatus":"unaffected","product":"Privileged Remote Access","vendor":"BeyondTrust","versions":[{"lessThanOrEqual":"25.3.2","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:72fa6f2afcf8ae68a5a4c3965a356de4a1c64e63f2e4acae7e76939f17385c70 · sha256:0bcdde05482c5508… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":9.2,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityIm…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:72fa6f2afcf8ae68a5a4c3965a356de4a1c64e63f2e4acae7e76939f17385c70 · sha256:0bcdde05482c5508… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-287","description":"CWE-287 Improper Authentication","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:72fa6f2afcf8ae68a5a4c3965a356de4a1c64e63f2e4acae7e76939f17385c70 · sha256:0bcdde05482c5508… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"url":"https://www.beyondtrust.com/trust-center/security-advisories/bt26-03"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:72fa6f2afcf8ae68a5a4c3965a356de4a1c64e63f2e4acae7e76939f17385c70 · sha256:0bcdde05482c5508… · /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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