How severe is CVE-2025-34079?

CVE-2025-34079 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-34079 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-34079?

CVE-2025-34079 affects Nsclient Nsclient++. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-34079?

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-2025-34079 have an EU (EUVD) identifier?

Yes. CVE-2025-34079 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19752.

When was CVE-2025-34079 published?

CVE-2025-34079 was published on 2025-07-02 and last updated on 2026-06-17.

CVE-2025-34079

CVE-2025-34079 is a high-severity vulnerability in Nsclient Nsclient++ with a CVSS 3.x base score of 7.8. 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-94.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v4: 7.5
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-19752
Weakness: CWE-94
Affected product: Nsclient Nsclient++
Published: 2025-07-02
Last modified: 2026-06-17

Description

An authenticated remote code execution vulnerability exists in NSClient++ version 0.5.2.35 when the web interface and ExternalScripts module are enabled. A remote attacker with the administrator password can authenticate to the web interface (default port 8443), inject arbitrary commands as external scripts via the /settings/query.json API, save the configuration, and trigger the script via the /query/{name} endpoint. The injected commands are executed with SYSTEM privileges, enabling full remote compromise. This capability is an intended feature, but the lack of safeguards or privilege separation makes it risky when exposed to untrusted actors.

Frequently asked questions

What is CVE-2025-34079?: An authenticated remote code execution vulnerability exists in NSClient++ version 0.5.2.35 when the web interface and ExternalScripts module are enabled. A remote attacker with the administrator password can authenticate to the web interface (default port 8443), inject arbitrary commands as external scripts via the /settings/query.json API, save the configuration, and trigger the script via the /query/{name} endpoint. The injected commands are executed with SYSTEM privileges, enabling full remote compromise. This capability is an intended feature, but the lack of safeguards or privilege separation makes it risky when exposed to untrusted actors.
How severe is CVE-2025-34079?: CVE-2025-34079 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-34079 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-34079?: CVE-2025-34079 affects Nsclient Nsclient++. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-34079?: 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-2025-34079 have an EU (EUVD) identifier?: Yes. CVE-2025-34079 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19752.
When was CVE-2025-34079 published?: CVE-2025-34079 was published on 2025-07-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nsclient:nsclient\+\+:0.5.2.35:*:*:*:*:*:*:*

More vulnerabilities in Nsclient Nsclient++

CVE-2025-34078 — High (CVSS 7.8): A local privilege escalation vulnerability exists in NSClient++ 0.5.2.35 when both the web interface and…
CVE-2018-6384 — High (CVSS 7.8): Unquoted Windows search path vulnerability in NSClient++ before 0.4.1.73 allows non-privileged local users to execute…

All CVEs affecting Nsclient Nsclient++ →

Other CWE-94 (Code Injection) vulnerabilities

CVE-2026-57624 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in Blocksy Companion Pro <= 2.1.46 versions.
CVE-2026-10134 — Critical (CVSS 10.0): IBM Langflow OSS 1.0.0 through 1.9.3 allows an attacker to read every secret available to the Langflow process, read…
CVE-2026-53576 — Critical (CVSS 10.0): Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the authentication filter…
CVE-2026-10561 — Critical (CVSS 10.0): IBM Langflow OSS 1.0.0 through 1.9.3 has an vulnerability due to an improper isolation of Python execution combined…
CVE-2026-25470 — Critical (CVSS 10.0): Improper Control of Generation of Code ('Code Injection') vulnerability in ACPT ACPT (Pro) - Custom Post Types Plugin…
CVE-2026-48836 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in Easy Invoice <= 2.1.19 versions.

Browse all CWE-94 (Code Injection) vulnerabilities →