How severe is CVE-2025-34165?

CVE-2025-34165 has a CVSS 4.0 base score of 8.8, rated high severity.

Is CVE-2025-34165 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.

How do I fix CVE-2025-34165?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-34165 have an EU (EUVD) identifier?

Yes. CVE-2025-34165 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-26248.

When was CVE-2025-34165 published?

CVE-2025-34165 was published on 2025-08-30 and last updated on 2026-06-17.

CVE-2025-34165

CVE-2025-34165 is a high-severity vulnerability with a CVSS 4.0 base score of 8.8. 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-121.

Key facts

Severity: High (CVSS 4.0 base score 8.8)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-26248
Weakness: CWE-121
Published: 2025-08-30
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-34165?: 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.
How severe is CVE-2025-34165?: CVE-2025-34165 has a CVSS 4.0 base score of 8.8, rated high severity.
Is CVE-2025-34165 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.
How do I fix CVE-2025-34165?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-34165 have an EU (EUVD) identifier?: Yes. CVE-2025-34165 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-26248.
When was CVE-2025-34165 published?: CVE-2025-34165 was published on 2025-08-30 and last updated on 2026-06-17.

References

Other CWE-121 (Stack-based Buffer Overflow) vulnerabilities

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