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CVE-2018-3203

22
FAUCET Score

CVE-2018-3203 is a denial-of-service vulnerability affecting Oracle MySQL Server versions 8.0.12 and prior, specifically within the Optimizer subcomponent. This easily exploitable flaw allows a low-privileged attacker with network access to cause a complete system hang or repeated crashes of the MySQL Server. With a CVSS 3.0 Base Score of 6.5 (Medium), its primary impact is on availability. There is currently no known public exploit code (Metasploit, Nuclei, ExploitDB) and no evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
>= 8.0.0, <= 8.0.12CPE matchmatch criteria
cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:*
>= 7.3, <= 9.5CPE matchmatch criteria
cpe:2.3:a:netapp:oncommand_unified_manager:*:*:*:*:*:vsphere:*:*
>= 7.3, <= 9.5CPE matchmatch criteria
cpe:2.3:a:netapp:oncommand_unified_manager:*:*:*:*:*:windows:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.19%
Probability of exploitation in next 30 days
EPSS Percentile
80.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0219 is in the 92nd percentile among its peer group of 21,958 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (1)

oraclepatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2018-3203Moderate

mysql: Server: Optimizer unspecified vulnerability (CPU Oct 2018)

Oct 16, 2018

References

security.netapp.com / advisory/ntap-20181018-0002
Third Party Advisory
oracle.com / technetwork/security-advisory/cpuoct2018-4428296.html
PatchVendor Advisory
securityfocus.com / bid/105607
Third Party AdvisoryVDB Entry
securitytracker.com / id/1041888
Third Party AdvisoryVDB Entry