CVE-2026-50515

criticalpriority · track · 1EPSS 0.017 · 77 %ileDEEUNLRUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.69% (77th) EPSS

CVSS 9.9 · critical

Is it mine?

41 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

Deserialization of untrusted data in Azure Service Bus allows an authorized attacker to execute code over a network.

cvss

Technical severity, 0–10. One row per scoring source.

9.9

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.19.9criticalAV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19.9criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · ENISA EU

v3.19.9criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · secure@microsoft.com USexploitability 3.1 · impact 6

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.19.9criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Hsecondary · NCSC-NL NL

v3.19.9criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-502USCWE-502USCWE-502USCWE-502US

affected products (41)

Products and version ranges known to be affected.

Microsoft Azure Windows HLK for Windows Server 2022all versionscert_bundDEcpe:/a:microsoft:azure:windows_hlk_for_windows_server_2022
Microsoft Service Bus Azure Service Busall versionscert_bundDEcpe:/a:microsoft:service_bus:1.1
Microsoft Teamsall versionscert_bundDEcpe:/a:microsoft:teams:-
Microsoft Azure Service Busall versionsenisa_euvdEU
Microsoft Corp Azure Service Busall versionsfstec_bduRU
Microsoft Azure Service Busall versionsfixedmsrc_csafUS
Microsoft Microsoft 365 Apps for Enterprise for 32-bit Systems≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft 365 Apps for Enterprise for 64-bit Systems≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Access 2016 (32-bit edition)≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Access 2016 (64-bit edition)≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Excel 2016 (32-bit edition)≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Excel 2016 (64-bit edition)≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Office 2016 (32-bit edition)≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Office 2016 (64-bit edition)≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Office 2019 for 32-bit editions≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Office 2019 for 64-bit editions≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Office 365 for Mac≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Office LTSC 2021 for 32-bit editions≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Office LTSC 2021 for 64-bit editions≤ vers:unknown/*ncsc_nlNL
Microsoft Microsoft Office LTSC 2024 for 32-bit editions≤ vers:unknown/*ncsc_nlNL

showing 20 of 41

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2026-0286Kwetsbaarheden verholpen in Microsoft OfficeNL2026-08-11csaf · ncsc_nlNL
Microsoft heeft kwetsbaarheden verholpen in diverse Office producten.
WID-SEC-W-2026-2692Microsoft Office: Mehrere SchwachstellenDeutsch2026-08-06csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Microsoft Teams, Microsoft Azure Managed Instance und Microsoft Service Bus ausnutzen, um beliebigen Code auszuführen, erweiterte Berechtigungen zu erlangen oder Daten zu manipulieren.
msrc_CVE-2026-50515Azure Service Bus Remote Code Execution Vulnerability2026-08-06csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund msrc_csaf ncsc_nl NVD CVE.org MITRE

published 2026-08-07modified 2026-10-24

references (3)

External citations — patches, advisories, analysis.

scry

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