5.1

CVE-2025-34135: nagios nagios_xi

CVSS: 5.1v4.0MediumAnalyzed
Published 30-10-2025Last modified 30-09-2026
Open JSON

Vulnerability summary

CVE-2025-34135 is a medium (CVSS 5.1) vulnerability in nagios nagios_xi. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 28% of scored vulnerabilities.

Overall risk
20/100
0100
Low · default modelHow is this calculated?
CVSS score
5.1/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.36%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 30-10-2025
    PublishedVulnerability first disclosed.
  2. 30-09-2026
    Last modifiedVulnerability information updated.

Description

Nagios XI versions prior to 2024R1.4.2 configure some systemd unit files with permission sets that were too permissive. In particular, the nagios.service unit had executable permissions that were not required. Overly permissive permissions on service unit files can broaden local attack surface by enabling unintended execution behaviors or facilitating abuse of service operations when combined with other weaknesses.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.36%

Chance of exploitation in the next 30 days

Percentile

28%

Versus all other CVEs

30-day change

+0.02 pp

From 0.33% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.36%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Nagios2 products
  • nagios_xi< 2024 | 2024:r1 | 2024:r1.0.1 | 2024:r1.0.2 | 2024:r1.1 | 2024:r1.1.1 | 2024:r1.1.2 | 2024:r1.1.3 | 2024:r1.1.4 | 2024:r1.1.5 | 2024:r1.2 | 2024:r1.2.1 | 2024:r1.2.2 | 2024:r1.3 | 2024:r1.3.1 | 2024:r1.3.2 | 2024:r1.3.3 | 2024:r1.3.4 | 2024:r1.4 | 2024:r1.4.1
  • xi< 2024R1.4.2

1 vendor · 2 products

References

3 links