Unauthenticated privilege escalation via authentication replay
Published Nov 20, 2025 · Updated Nov 20, 2025
Authentication bypass in Microsoft Azure Bastion Developer allows remote attackers to gain elevated privileges by replaying authentication data. Microsoft identifies the weakness as capture-replay but has not disclosed which authentication artifact is reusable or which validation fails. Exploitation requires network access but no prior privileges or user interaction, and it can expose or alter resources beyond the service boundary.
Summary
What happened
Authentication bypass in Microsoft Azure Bastion Developer allows remote attackers to gain elevated privileges by replaying authentication data. Microsoft identifies the weakness as capture-replay but has not disclosed which authentication artifact is reusable or which validation fails. Exploitation requires network access but no prior privileges or user interaction, and it can expose or alter resources beyond the service boundary.
The record
- CVE
- CVE-2025-49752
- Published
- Nov 20, 2025
- Updated
- Nov 20, 2025
- Vendor
- Microsoft
- Product
- Azure Bastion Developer
- Classifications
- CWE-294, T1550
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 20, 2025CVE publishedPublication date reported by the CVE source.
- Nov 20, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=N/A
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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.
Weakness, pattern, technique
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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