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CVE-2018-8736

73
FAUCET Score

CVE-2018-8736 is a high-severity privilege escalation vulnerability affecting Nagios XI versions 5.2.x through 5.4.12. This flaw allows an authenticated attacker to chain with an existing Remote Code Execution (RCE) vulnerability to escalate privileges to root. With a CVSS score of 8.8, the vulnerability has a high impact on confidentiality, integrity, and availability, and can be exploited with low complexity over the network. While not listed on the KEV catalog, multiple public exploit modules, including Metasploit and ExploitDB entries, demonstrate its exploitability. Despite the availability of exploit code, there is no significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.2.0, < 5.4.13CPE matchmatch criteria
cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
46.95%
Probability of exploitation in next 30 days
EPSS Percentile
98.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Metasploit: Nagios XI Chained Remote Code Execution · Mar 6, 2016
ExploitDB: EDB-44969 · Jul 2, 2018
This CVE's current EPSS score of 0.4695 is in the 98th percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

assets.nagios.com / downloads/nagiosxi/CHANGES-5.TXT
Release NotesVendor Advisory
blog.redactedsec.net / exploits/2018/04/26/nagios.html
ExploitRelease NotesTechnical DescriptionThird Party Advisory
gist.github.com / caleBot/f0a93b5a98574393e0139104eacc2d0f
Third Party Advisory
exploit-db.com / exploits/44560
ExploitThird Party AdvisoryVDB Entry
exploit-db.com / exploits/44969
ExploitThird Party AdvisoryVDB Entry
nagios.com / downloads/nagios-xi/change-log
Release NotesVendor Advisory