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CVE-2019-9099

28
FAUCET Score

CVE-2019-9099 is a critical buffer overflow vulnerability affecting the built-in web server of several Moxa MGate MB series devices, including MB3170, MB3270, MB3280, MB3480, MB3660, and MB3180, in specific firmware versions. With a CVSS score of 9.8, this vulnerability allows unauthenticated remote attackers to initiate Denial of Service (DoS) and potentially execute arbitrary code due to its low attack complexity and network-based vector. Despite its high severity and potential for complete compromise, there is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.0CPE matchmatch criteria
cpe:2.3:o:moxa:mb3170_firmware:*:*:*:*:*:*:*:*
<= 4.0CPE matchmatch criteria
cpe:2.3:o:moxa:mb3270_firmware:*:*:*:*:*:*:*:*
<= 2.0CPE matchmatch criteria
cpe:2.3:o:moxa:mb3180_firmware:*:*:*:*:*:*:*:*
<= 3.0CPE matchmatch criteria
cpe:2.3:o:moxa:mb3280_firmware:*:*:*:*:*:*:*:*
<= 3.0CPE matchmatch criteria
cpe:2.3:o:moxa:mb3480_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.04%
Probability of exploitation in next 30 days
EPSS Percentile
89.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0404 is in the 83rd 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

moxa.com / en/support/support/security-advisory/mb3710-3180-3270-3280-3480-3660-vulnerabilities
Vendor Advisory
us-cert.gov / ics/advisories/icsa-20-056-01
Third Party AdvisoryUS Government Resource