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CVE-2018-9866

31
FAUCET Score

CVE-2018-9866 is a critical vulnerability in SonicWall Global Management System (GMS) virtual appliances, versions 8.1 and earlier, stemming from insufficient validation of user-supplied parameters in XML-RPC calls. This allows remote attackers to execute arbitrary code on affected systems. With a CVSS score of 9.8 (CRITICAL), it presents a severe risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media coverage, including mentions in articles discussing IoT botnet targeting.

Impacted Technologies

VendorProductVersion(s)CPE
<= 8.1CPE matchmatch criteria
cpe:2.3:a:sonicwall:global_management_system:*:*:*:*:*:*:*:*

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
4.50%
Probability of exploitation in next 30 days
EPSS Percentile
90.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0450 is in the 84th 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

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

github.com / rapid7/metasploit-framework/pull/10305
ExploitIssue TrackingThird Party Advisory
psirt.global.sonicwall.com / vuln-detail/SNWLID-2018-0007
Third Party Advisory
twitter.com / ddouhine/status/1019251292202586112
Third Party Advisory