6.9
MediumCVSS 4.0 · from hackerone
CVE-2026-106078
A vulnerability allowing an unauthenticated attacker to bypass REST API authentication with a forged federation token and receive responses from REST API endpoints that do not call the Veeam Backup…
Backup for Microsoft 365 · CWE-347 · CWE-347AffectedBackup for Microsoft 365
FixNo fix listed yet.
PublishedOct 27, 16:16 · hackerone
ScoredOct 27 · 6.9 · hackerone
Exploit code publicNone known · checked 21:18 UTC
ExploitedNone known · CISA KEV checked 22:09 UTC
What we know
No known exploitation. CISA KEV, checked 22:09 UTC.
No public exploit code known. Exploit-DB, Metasploit, Nuclei, checked 21:18 UTC.
An attacker only needs network access to the target. No login needed. CVSS: network, no privileges.
Description
A vulnerability allowing an unauthenticated attacker to bypass REST API authentication with a forged federation token and receive responses from REST API endpoints that do not call the Veeam Backup for Microsoft 365 backup service.
From hackerone
Affected and fixed versions
ProductAffectedFixed inBackup for Microsoft 3658.0 – 8.6.0.1102–
Exploit code
Exploit-DBnone knownMetasploitnone knownNucleinone known