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: 0% (37th 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 0% (37th 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:-:*:*:*:*:*:*:*
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