CVE-2026-56165Disclosure(microsoft / account)

LOWCVSS 9.8 · CRITICAL

Signal is active with 2 mentions in latest observed window

Immediate actions

Patch microsoft account systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Heap-based buffer overflow in Microsoft Account allows an unauthorized attacker to execute code over a network.

microsoft CVEs Back to dashboard

0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56165

Weakness type (CWE)

CWE-122

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

account

Threat summary

Patch or workaround signal is available
5 mentions across 2 observed days
Momentum state: stable

What's happening

Patch or workaround mentioned in 1 signal
Technical details provided in 5 signals
Disclosure: 2 classified signals
General: 2 classified signals
Peaked 1d ago at 3 mentions (2026-07-24); latest day: 2
5 total mentions across 2 days

Affected systems

Vendors

microsoft

Products

account

1 version affected across 1 product

Deep dive

Activity timeline5 mentions / 2d

Signal classification3 categories

Disclosure

240.0%

General

240.0%

Patch

120.0%

Referenced assets6 URLs

By indicator

Classification over time

Date	Total	Labels

2026-07-24	3	Disclosure1General2
2026-07-27	2	Disclosure1Patch1

Full discourse5 posts

kawn@kawn202088d
Disclosure
#securityupdate #microsoft #定例外 2026. 7.23 Microsoft Account Remote Code Execution Vulnerability CVE-2026-56165 Security Vulnerability リリース日: - マイクロソフト https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56165
Post summary
Microsoft announced a security update for CVE‑2026‑56165, a remote code execution flaw in Microsoft Account. The announcement links to the vendor advisory but does not provide PoC, exploit code, or remediation details.
1010062
92 followersView on X
kawn@kawn202088d
Patch
#securityupdate #microsoft #定例外 CVE-2026-56165 「…様が取るべきアクションはありません」影響: リモートでコードが実行される最大深刻度: 緊急 CVSS:3.1 9.8 / 8.5 悪用可能性・一般に公開: No ・悪用: No ・Exploitability assessment: 悪用される可能性は低い https://x.com/kawn2020/status/2081633420455899328
Post summary
Microsoft advisory for CVE-2026-56165 notes a remote code execution vulnerability, but no active exploitation or required action.
1000034
92 followersView on X
ADK Cyber@ADKCyber90d
Disclosure
CVE-2026-56165 (CVSS 9.8): heap buffer overflow in Microsoft Account enables remote code execution. Review patches and assess exposure. http://adkcyber.com via NVD Recent High CVSS #CyberSecurity #InfoSec #Vulnerability https://t.co/6W2n1rpUnE
Post summary
The tweet announces CVE-2026-56165, a high‑severity heap buffer overflow that allows remote code execution in Microsoft Account, notes that patches are available, but does not provide PoC, exploit code, or evidence of active exploitation.
0000047
89 followersView on X
Vulmon Vulnerability Feed@VulmonFeeds91d
General
CVE-2026-56165 Heap-Based Buffer Overflow in Microsoft Account Enables R... https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-56165 Don't wait vulnerability scanning results: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=2
Post summary
The tweet references CVE-2026-56165 as a heap‑based buffer overflow in Microsoft Account, but offers no PoC, exploit code, patch, or evidence of active exploitation.
00000135
4.1K followersView on X
Windows Forum@windowsforum91d
General
🔐 CVE-2026-56165 is labeled a Microsoft Account RCE, but scope and fix details remain undisclosed. Right now, it’s less a security bulletin and more a suspense trailer for admins. https://windowsforum.com/threads/cve-2026-56165-microsoft-account-rce-scope-and-fix-undisclosed.440213/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #WindowsSecurity #MicrosoftAccount #RemoteCodeExecution #Cve202656165 https://t.co/OiAASWtfTy
Post summary
The post merely notes CVE‑2026‑56165 as a Microsoft Account RCE with no further technical or mitigation details, leaving administrators uncertain.
0000053
1.3K followersView on X

CPE platform detail1 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

1 of 1 entries

Part	Vendor	Product	Version	Target SW	Target HW
App	microsoft	account	-	-	-

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What researchers are saying

CVE-2026-56165

ADK Cyber[verified]@ADKCyberDisclosure

The tweet announces CVE-2026-56165, a high‑severity heap buffer overflow that allows remote code execution in Microsoft Account, notes that patches are available, but does not provide PoC, exploit code, or evidence of active exploitation.

Windows Forum[verified]@windowsforumGeneral

The post merely notes CVE‑2026‑56165 as a Microsoft Account RCE with no further technical or mitigation details, leaving administrators uncertain.

kawn@kawn2020Disclosure

Microsoft announced a security update for CVE‑2026‑56165, a remote code execution flaw in Microsoft Account. The announcement links to the vendor advisory but does not provide PoC, exploit code, or remediation details.

kawn@kawn2020Patch

Microsoft advisory for CVE-2026-56165 notes a remote code execution vulnerability, but no active exploitation or required action.

Vulmon Vulnerability Feed@VulmonFeedsGeneral

The tweet references CVE-2026-56165 as a heap‑based buffer overflow in Microsoft Account, but offers no PoC, exploit code, patch, or evidence of active exploitation.