Security readout for executives and security teams
Plain-English summary
Nagios XI 5.7.4 has a permission-handling flaw that can let a low-privileged local authenticated user gain root-level code execution. This is a serious internal escalation risk on monitoring servers, especially because those systems often have broad network visibility and operational trust.
Executive priority
Treat this as a high-priority remediation for any Nagios XI 5.7.4 server. The main business risk is privilege escalation on a monitoring system, which may help an intruder deepen access and undermine operational visibility.
Technical view
CVE-2020-5796 is described as improper preservation of permissions in Nagios XI 5.7.4. The reported impact is that a local, low-privileged authenticated user can weaken file permissions, then write and execute arbitrary PHP code with root privileges.
Likely exposure
Exposure appears limited to Nagios XI 5.7.4 systems where an attacker already has local, low-privileged authenticated access. Internet exposure is not established by the provided sources, but compromise of a user account on the host could make the issue relevant.
Exploitation context
The provided sources do not show KEV listing or active exploitation. The issue is still high impact because it can turn limited local access into root-level execution on a monitoring platform.
Researcher notes
Evidence is limited to the CVE description and Tenable reference in the source bundle. No CVSS vector, CWE mapping, fixed version, exploit proof, or active exploitation confirmation is provided here.
Mitigation direction
- Identify any Nagios XI 5.7.4 installations.
- Check Nagios and Tenable guidance for the supported fix path.
- Restrict local user access to Nagios XI hosts.
- Review Nagios XI file permissions for unintended write access.
- Monitor for unexpected PHP files or execution activity.
Validation and detection
- Confirm installed Nagios XI versions on monitoring hosts.
- Review local authenticated user accounts on affected systems.
- Inspect Nagios XI directories for weakened permissions.
- Check logs for unexpected PHP execution or file writes.
- Verify remediation against vendor guidance before closure.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2020-5796 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.tenable.com/security/research/tra-2020-61CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.