Microsoft Account cross site scripting

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Microsoft Account. This affects an unknown part. The manipulation results in cross site scripting. This vulnerability was named CVE-2026-21264. The attack may be performed from remote. There is no available exploit. This product is provided as a managed service, meaning users do not have the ability to maintain vulnerability countermeasures themselves.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Microsoft Account (affected version not known). Affected is some unknown functionality. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Account allows an unauthorized attacker to perform spoofing over a network.

The advisory is available at msrc.microsoft.com. This vulnerability is traded as CVE-2026-21264 since 12/11/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 02/03/2026). This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

This product is available as a managed service. Users are not able to maintain vulnerability countermeasures themselves.

The vulnerability is also documented in the databases at CNNVD (CNNVD-202601-3929), EUVD (EUVD-2026-4507) and CERT Bund (WID-SEC-2026-0201). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Microsoft Azure
  • Microsoft 365 Copilot
  • Microsoft Entra

Productinfo

Vendor

Name

License

Managed Service

  • yes

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.6

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔒

CNA Base Score: 9.3
CNA Vector (microsoft): 🔒

CVSSv2info

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

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
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

12/11/2025 CVE reserved
01/23/2026 +43 days Advisory disclosed
01/23/2026 +0 days VulDB entry created
02/03/2026 +11 days VulDB entry last update

Sourcesinfo

Vendor: microsoft.com

Advisory: msrc.microsoft.com
Status: Confirmed

CVE: CVE-2026-21264 (🔒)
GCVE (CVE): GCVE-0-2026-21264
GCVE (VulDB): GCVE-100-342498
EUVD: 🔒
CERT Bund: WID-SEC-2026-0201 - Microsoft Azure, Copilot und Entra: Mehrere Schwachstellen
CNNVD: CNNVD-202601-3929 - Microsoft Account 安全漏洞

Entryinfo

Created: 01/23/2026 07:51
Updated: 02/03/2026 19:07
Changes: 01/23/2026 07:51 (61), 01/23/2026 15:25 (6), 01/24/2026 01:58 (7), 01/24/2026 12:59 (1), 01/25/2026 14:14 (1), 01/25/2026 15:30 (1), 02/03/2026 19:07 (11)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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