How severe is CVE-2025-34164?

CVE-2025-34164 has a CVSS 4.0 base score of 9.3, rated critical severity.

Is CVE-2025-34164 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-34164?

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.

Does CVE-2025-34164 have an EU (EUVD) identifier?

Yes. CVE-2025-34164 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-26268.

When was CVE-2025-34164 published?

CVE-2025-34164 was published on 2025-08-30 and last updated on 2026-06-17.

CVE-2025-34164

CVE-2025-34164 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.3. 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-122.

Key facts

Severity: Critical (CVSS 4.0 base score 9.3)
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-26268
Weakness: CWE-122
Published: 2025-08-30
Last modified: 2026-06-17

Description

A heap-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 execute arbitrary code.

Frequently asked questions

What is CVE-2025-34164?: A heap-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 execute arbitrary code.
How severe is CVE-2025-34164?: CVE-2025-34164 has a CVSS 4.0 base score of 9.3, rated critical severity.
Is CVE-2025-34164 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-34164?: 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.
Does CVE-2025-34164 have an EU (EUVD) identifier?: Yes. CVE-2025-34164 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-26268.
When was CVE-2025-34164 published?: CVE-2025-34164 was published on 2025-08-30 and last updated on 2026-06-17.

References

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