Microsoft Azure Bastion Developer authentication replay

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft Azure Bastion Developer. It has been classified as critical. This affects an unknown function. This manipulation causes authentication replay. This vulnerability is handled as CVE-2025-49752. The attack can be initiated remotely. There is not any exploit available. This product is available as a managed service. Users are not able to maintain vulnerability countermeasures themselves.

Detailsinfo

A vulnerability has been found in Microsoft Azure Bastion Developer (unknown version) and classified as critical. Affected by this vulnerability is an unknown code block. The manipulation with an unknown input leads to a authentication replay vulnerability. The CWE definition for the vulnerability is CWE-294. A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes). As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is shared at msrc.microsoft.com. This vulnerability is known as CVE-2025-49752 since 06/10/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/27/2025). MITRE ATT&CK project uses the attack technique T1040 for this issue.

The vulnerability is also documented in the databases at EUVD (EUVD-2025-198370) and CERT Bund (WID-SEC-2025-2688). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Microsoft Azure
  • Microsoft SharePoint
  • Microsoft Defender
  • Microsoft Dynamics 365

Productinfo

Type

Vendor

Name

License

Managed Service

  • yes

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.6
VulDB Meta Temp Score: 8.5

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 10.0
CNA Vector (microsoft): 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Authentication replay
CWE: CWE-294 / CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Status: 🔍

0-Day Time: 🔒

Timelineinfo

06/10/2025 CVE reserved
11/21/2025 +164 days Advisory disclosed
11/21/2025 +0 days VulDB entry created
11/27/2025 +6 days VulDB entry last update

Sourcesinfo

Vendor: microsoft.com

Advisory: msrc.microsoft.com
Status: Confirmed

CVE: CVE-2025-49752 (🔒)
GCVE (CVE): GCVE-0-2025-49752
GCVE (VulDB): GCVE-100-333121
EUVD: 🔒
CERT Bund: WID-SEC-2025-2688 - Microsoft Azure, SharePoint, Defender, Dynamics: Mehrere Schwachstellen

Entryinfo

Created: 11/21/2025 03:27
Updated: 11/27/2025 11:13
Changes: 11/21/2025 03:27 (61), 11/22/2025 08:59 (1), 11/27/2025 11:13 (7)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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