CVE-2025-34165: NetSupport Manager < 14.12.0000 Stack-Based Buffer Overflow

Severity: high (CVSS 8.8 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-08-30 · updated 2026-10-18
Weakness: CWE-121

Description

A stack-based buffer overflow vulnerability in NetSupport Manager 14.x versions prior to 14.12.0000 allows a remote, unauthenticated attacker to cause a denial of service (DoS) or potentially leak a limited amount of memory.

Affected products

NetSupport Ltd. NetSupport Manager: from 14.0 before 14.12.0000 — fixed in 14.12.0000

How to fix

Upgrade to a fixed version: NetSupport Ltd. NetSupport Manager 14.12.0000. Check the vendor advisory for mitigations.

References

https://www.netsupportmanager.com/
https://www.vulncheck.com/advisories/netsupport-client-manager-buffer-overflows

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