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CVE-2018-9091

28
FAUCET Score

CVE-2018-9091 is a critical session management vulnerability affecting KEMP LoadMaster Operating System (LMOS) versions 6.0.44 through 7.2.41.2 and LTS LMOS before 7.1.35.5. This flaw allows an unauthenticated, remote attacker to bypass security, gain system privileges, and execute arbitrary commands, potentially exposing sensitive data like certificates and private keys. With a CVSS score of 9.8 (CRITICAL), it presents a high risk due to its network-based attack vector and low attack complexity. Despite its severity, there is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 6.0.44, <= 7.2.41.2CPE matchmatch criteria
cpe:2.3:o:kemptechnologies:loadmaster_operating_system:*:*:*:*:*:*:*:*
< 7.1.35.5CPE matchmatch criteria
cpe:2.3:o:kemptechnologies:loadmaster_operating_system:*:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.33%
Probability of exploitation in next 30 days
EPSS Percentile
87.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0333 is in the 79th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

support.kemptechnologies.com / hc/en-us/articles/360001982452-Mitigation-for-Remote-Access-Execution-Vulnerability
PatchVendor Advisory