Authenticated code execution via unsafe deserialization
Published Aug 6, 2026 · Updated Aug 25, 2026
Deserialization of untrusted data in Microsoft Azure Service Bus allows remote authenticated users to execute code over a network. Microsoft has disclosed only that Azure Service Bus deserializes untrusted data; the vulnerable handler, message path, and unsafe object-processing operation have not been published. The exposed surface is an exclusively hosted Microsoft service, so exploitation appears to require authenticated Service Bus access, but public records do not bound tenant impact or cross-service reach.
Summary
What happened
Deserialization of untrusted data in Microsoft Azure Service Bus allows remote authenticated users to execute code over a network. Microsoft has disclosed only that Azure Service Bus deserializes untrusted data; the vulnerable handler, message path, and unsafe object-processing operation have not been published. The exposed surface is an exclusively hosted Microsoft service, so exploitation appears to require authenticated Service Bus access, but public records do not bound tenant impact or cross-service reach.
The record
- CVE
- CVE-2026-50515
- Published
- Aug 6, 2026
- Updated
- Aug 25, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-502, CAPEC-586
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 6, 2026CVE publishedPublication date reported by the CVE source.
- Aug 25, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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