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CVE-2018-8735

80
FAUCET Score

CVE-2018-8735 is a critical remote command execution (RCE) vulnerability affecting Nagios XI versions 5.2.x through 5.4.12, allowing authenticated attackers to inject and execute arbitrary operating system commands. With a CVSS score of 8.8 (High), this flaw is easily exploitable over the network with low attack complexity and can lead to complete compromise of confidentiality, integrity, and availability. While not listed on CISA's KEV catalog, multiple public exploit modules, including Metasploit, exist, indicating a high likelihood of exploitation. Despite the availability of exploit code, there is minimal public discussion or media coverage surrounding this vulnerability.

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
64.17%
Probability of exploitation in next 30 days
EPSS Percentile
99.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
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 0.6417 is in the 99th percentile among its peer group of 17,822 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
ExploitTechnical 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