CVE-2026-65667
CVE-2026-65667 is a critical-severity vulnerability in Microsoft Teams with a CVSS 3.x base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-862.
Key facts
- Severity: Critical (CVSS 3.x base score 10.0)
- EPSS exploit prediction: 1% (55th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-862
- Affected product: Microsoft Teams
- Published:
- Last modified:
Description
Missing authorization in Microsoft Teams allows an unauthorized attacker to elevate privileges over a network.
Frequently asked questions
- What is CVE-2026-65667?
- Missing authorization in Microsoft Teams allows an unauthorized attacker to elevate privileges over a network.
- How severe is CVE-2026-65667?
- CVE-2026-65667 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
- Is CVE-2026-65667 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-65667?
- CVE-2026-65667 affects Microsoft Teams. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-65667?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2026-65667 published?
- CVE-2026-65667 was published on 2026-08-07 and last updated on 2026-08-11.
References
Affected products (1)
- cpe:2.3:a:microsoft:teams:-:*:*:*:*:*:*:*
More vulnerabilities in Microsoft Teams
- CVE-2026-62896 — Critical (CVSS 9.6): Improper authentication in Microsoft Teams allows an authorized attacker to elevate privileges over a network.
- CVE-2026-33823 — Critical (CVSS 9.6): Improper authorization in Microsoft Teams allows an authorized attacker to disclose information over a network.
- CVE-2026-65768 — High (CVSS 8.8): Improper limitation of a pathname to a restricted directory ('path traversal') in Microsoft Teams for Android allows an…
- CVE-2026-65767 — High (CVSS 8.8): Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Teams for Android…
- CVE-2023-4863 — High (CVSS 8.8): Heap buffer overflow in libwebp in Google Chrome prior to 116.0.5845.187 and libwebp 1.3.2 allowed a remote attacker to…
- CVE-2023-29330 — High (CVSS 8.8): Microsoft Teams Remote Code Execution Vulnerability
All CVEs affecting Microsoft Teams →
Other CWE-862 (Missing Authorization) vulnerabilities
- CVE-2026-101000 — Critical (CVSS 10.0): A vulnerability was determined in Netcore NBR100V2 1.3.240614.030928. This affects the function uci.apply of the file…
- CVE-2026-97360 — Critical (CVSS 10.0): HFS2 version 2.4.0 and earlier contains an unauthenticated arbitrary file access vulnerability that allows…
- CVE-2026-65381 — Critical (CVSS 10.0): A validation issue existed in the entitlement verification. This issue was addressed with improved validation of the…
- CVE-2026-81648 — Critical (CVSS 10.0): The CryptoPayment Gateway WordPress plugin from 1.2.1 to 1.2.2 does not apply an authorization check on one of its AJAX…
- CVE-2026-77770 — Critical (CVSS 10.0): The miniOrange 2FA WordPress plugin before 6.3.1, miniOrange 2FA WordPress plugin before 19.3 does not require a…
- CVE-2026-48168 — Critical (CVSS 10.0): PraisonAI is a multi-agent teams system. In versions prior to 4.6.40, the bundled Claude GitHub Actions workflow is…
Browse all CWE-862 (Missing Authorization) vulnerabilities →