Buffer overflow in Microsoft Teams For Android

CVE-2025-53783

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

Vulnerability class: Buffer Overflow

EPSS: 0.002 (40.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-53783?
CVE-2025-53783 is a high-severity vulnerability in Microsoft Teams For Android, classified under Heap-based Buffer Overflow. CVSS score: 7.5/10. Published 2025-08-12.
How severe is CVE-2025-53783?
High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2025-53783 known to be exploited?
3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.