CVE-2026-65667Disclosure(microsoft / teams)

LOWCVSS 10.0 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

Patch microsoft teams systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Missing authorization in Microsoft Teams allows an unauthorized attacker to elevate privileges 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-2026-65667

Weakness type (CWE)

CWE-862

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.

teams

Threat summary

Patch or workaround signal is available
9 mentions across 6 observed days
Momentum state: stable

What's happening

Patch or workaround mentioned in 4 signals
Technical details provided in 7 signals
Disclosure: 6 classified signals
General: 1 classified signal
Peaked 4d ago at 4 mentions (2026-08-07); latest day: 1
9 total mentions across 6 days

Affected systems

Vendors

microsoft

Products

teams

1 version affected across 1 product

Deep dive

Activity timeline9 mentions / 6d

Signal classification3 categories

Disclosure

666.7%

Patch

222.2%

General

111.1%

Referenced assets8 URLs

By indicator

Classification over time

Date	Total	Labels

2026-08-06	1	Disclosure1
2026-08-07	4	Disclosure3Patch1
2026-08-08	1	Patch1
2026-08-09	1	Disclosure1
2026-08-14	1	Disclosure1
2026-08-15	1	General1

Full discourse9 posts

transilienceai@transilienceai45d
Disclosure
⚠️ CVE-2026-65667 | Microsoft Teams | CVSS 10.0 Critical Elevation of Privilege caused by CWE-862: Missing Authorization. Remote, unauthenticated, and zero-click exploitation is possible. Microsoft deployed a server-side fix. No public PoC or observed exploitation so far. Action: Verify tenant remediation and hunt for anomalous privilege escalation or unauthorized Teams access. Full Advisory: https://app.transilience.cloud/run-history/ff5bd407-4db8-4521-8ae1-65bd75be0e3e?file=components%2FAdvisoriesPanel_2026-08-07.tsx
Post summary
Microsoft has disclosed CVE‑2026‑65667, a critical elevation‑of‑privilege flaw in Teams with remote, zero‑click exploitation possible, and has deployed a server‑side fix; no public PoC or exploitation reports are available.
011314.5K
329 followersView on X
CVE@CVEnew46d
Disclosure
CVE-2026-65667 Missing authorization in Microsoft Teams allows an unauthorized attacker to elevate privileges over a network. https://www.cve.org/CVERecord?id=CVE-2026-65667
Post summary
The post announces Microsoft Teams CVE‑2026‑65667 as a missing‑authorization flaw that allows attackers to elevate privileges over a network, with no PoC, exploit, patch, or active exploitation details provided.
010111.4K
57.9K followersView on X
Steve Waterhouse@Water_Steve46d
Patch
Pour votre information // For your information Bon weekend ! Correctifs hors-cycle (#OoB) menaçant envers les les produits logiciels de @Microsoft et @Apple déployés En provenance de l'article de @SecurityWeek ci-bas mentionné: "Trois de ces vulnérabilités, CVE-2026-63508, CVE-2026-56162 et CVE-2026-65667, ont un niveau de gravité maximal de 10/10. Quatre autres vulnérabilités, CVE-2026-50515 (RCE dans #Azure Service Bus), CVE-2026-62830 (EoP dans #Azure SRE Agent), CVE-2026-59115 (EoP dans #Entra Provisioning Service) et CVE-2026-50481 (EoP dans #ActiveDirectory) ont un score CVSS de 9,9/10. Ces quatre vulnérabilités sont exploitables à distance. Des correctifs visant à remédier à cette faille de sécurité ont été intégrés dans #macOS #Tahoe 26.6.1, #macOS #Sequoia 15.7.9 et #macOS #Sonoma 14.8.9" 20260807 - #Microsoft, #Apple Release Fresh #SecurityUpdates https://www.securityweek.com/microsoft-apple-release-fresh-security-updates/ #infosec #cybersecurity #secinfo #cybersecurite #cyberwar #cyberwarfare #OPSEC @infosecsw #criticalinfrastructure #infrastructureessentielle #patchmanagement #gestioncorrectifs #DQP #ASAP
Post summary
The post advertises Microsoft and Apple out‑of‑cycle updates that patch several high‑severity CVEs, including detailed technical information, but it does not discuss PoCs, exploits, or active attacks.
01010161
3.9K followersView on X
Sami Laiho@samilaiho45d
Patch
Microsoft Teams Elevation of Privilege Vulnerability URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65667 Classification: Critical, Solution: Official Fix, Exploit Maturity: Not Defined, CVSSv3.1: 10.0
Post summary
The CVE describes a critical elevation‑of‑privilege flaw in Microsoft Teams, for which an official fix has been released; no PoC, exploit code, or active exploitation details are provided.
000101.0K
30.6K followersView on X
ケイ | IT・セキュリティ系副業Webライター@Teeeda_worker37d
General
Microsoft TeamsとMicrosoft 365管理センターにCriticalの権限昇格脆弱性 https://www.cybernote.click/2026/08/14/microsoft-teams-cve-2026-65667-m365-admin-center/ #IT #Security #cybersecurity
Post summary
The post alerts that CVE-2026-65667 is a critical privilege‑escalation flaw in Microsoft Teams and the Microsoft 365 Admin Center, but offers no further technical, exploit, or patch details.
0000047
213 followersView on X
ケイ | IT・セキュリティ系副業Webライター@Teeeda_worker39d
Disclosure
【緊急】CVE-2026-65667 マイクロソフトのMicrosoft Teamsに深刻な脆弱性｜即時対応が必要 https://www.cybernote.click/2026/08/10/cve-2026-65667-microsoft-teams/ #IT #Security #cybersecurity
Post summary
The post announces an emergency status for CVE‑2026‑65667 affecting Microsoft Teams, urging immediate action, but offers no technical details, mitigations, or proof of exploitation.
0000045
213 followersView on X
Hugo | DevOps | Cybersecurity 🇱🇻@HugoValters43d
Disclosure
CVE-2026-65667 - Critical privilege escalation in Microsoft Teams. Missing authorization enables network-based elevation. CVSS 10. Patch unavailable - monitor for updates. #CVE #Microsoft #infosec https://www.valtersit.com/cve/CVE-2026-65667 #infosec #cybersecurity #CVE #Linux #infosec #infosec #devsecops #devops #developer #sysadmin #100daysofcode #git #github #gitlab #redteam #blueteam #ethicalhacker #ethicalhacking #cybersecurityawareness #cybersecurity #cybersecuritynews #cybersecuritytips #python #hacker #linux #kali #ubuntu
Post summary
The post discloses CVE‑2026‑65667, noting a critical MS Teams privilege escalation with CVSS 10, says no patch exists yet but recommends monitoring for updates; no PoC, exploit, or active exploitation evidence is provided.
0000068
1.0K followersView on X
Upwind Security MDR@UpwindMDR46d
Disclosure
🚨Critical - Microsoft Teams Missing Authorization Privilege Escalation (CVE-2026-65667) Microsoft Teams has a CWE-862 missing authorization check allowing unauthenticated network attackers to invoke privileged actions by calling exposed service endpoints without required access validation. Successful exploitation results in privilege escalation within the Teams environment. 👉Affected: Microsoft Teams (versions unspecified)
Post summary
The message announces a critical privilege‑escalation vulnerability (CVE‑2026‑65667) in Microsoft Teams, pointing out a missing authorization check but offers no PoC, exploit, or mitigation details.
00000113
282 followersView on X
Windows Forum@windowsforum46d
Disclosure
🚨 Microsoft published a Teams elevation-of-privilege CVE with no affected version, no fix, and barely enough detail to act. IT admins get a vulnerability advisory—or a scavenger hunt? https://windowsforum.com/security-alerts.84/cve-2026-65667-teams-eop-no-affected-version-or-fix.441880/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #MicrosoftTeams #VulnerabilityManagement #ElevationOfPrivilege https://t.co/yJGxyzczaW
Post summary
Microsoft announced a Teams elevation‑of‑privilege vulnerability (CVE‑2026‑65667) yet released no affected version information, fixes, or detailed technical context, leaving IT admins with minimal actionable guidance.
0000067
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	teams	-	-	-

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What researchers are saying

CVE-2026-65667

transilienceai[verified]@transilienceaiDisclosure

Microsoft has disclosed CVE‑2026‑65667, a critical elevation‑of‑privilege flaw in Teams with remote, zero‑click exploitation possible, and has deployed a server‑side fix; no public PoC or exploitation reports are available.

Steve Waterhouse[verified]@Water_StevePatch

The post advertises Microsoft and Apple out‑of‑cycle updates that patch several high‑severity CVEs, including detailed technical information, but it does not discuss PoCs, exploits, or active attacks.

Sami Laiho[verified]@samilaihoPatch

The CVE describes a critical elevation‑of‑privilege flaw in Microsoft Teams, for which an official fix has been released; no PoC, exploit code, or active exploitation details are provided.

Hugo | DevOps | Cybersecurity 🇱🇻[verified]@HugoValtersDisclosure

The post discloses CVE‑2026‑65667, noting a critical MS Teams privilege escalation with CVSS 10, says no patch exists yet but recommends monitoring for updates; no PoC, exploit, or active exploitation evidence is provided.

Upwind Security MDR[verified]@UpwindMDRDisclosure

The message announces a critical privilege‑escalation vulnerability (CVE‑2026‑65667) in Microsoft Teams, pointing out a missing authorization check but offers no PoC, exploit, or mitigation details.

Windows Forum[verified]@windowsforumDisclosure

Microsoft announced a Teams elevation‑of‑privilege vulnerability (CVE‑2026‑65667) yet released no affected version information, fixes, or detailed technical context, leaving IT admins with minimal actionable guidance.

CVE@CVEnewDisclosure

The post announces Microsoft Teams CVE‑2026‑65667 as a missing‑authorization flaw that allows attackers to elevate privileges over a network, with no PoC, exploit, patch, or active exploitation details provided.

ケイ | IT・セキュリティ系副業Webライター@Teeeda_workerGeneral

The post alerts that CVE-2026-65667 is a critical privilege‑escalation flaw in Microsoft Teams and the Microsoft 365 Admin Center, but offers no further technical, exploit, or patch details.