CVE-2018-2776: Oracle Corporation MySQL Server vulnerability |…

CVE-2018-2776: Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Group Replication GCS).

Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Group Replication GCS). Supported versions that are affected are 5.7.21 and prior. Easily exploitable vulnerability allows high privileged attacker with network access via XCom to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.0 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

UnknownCVSS not scoredNot KEV-listedUpdatedOct 3, 2024, 20:20 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2018-2776 can let a highly privileged attacker who can reach MySQL Group Replication XCom crash or hang MySQL Server. The business impact is service outage, not data theft, based on the cited CVSS vector. Exposure is most likely where MySQL Server 5.7.21 or earlier uses Group Replication GCS/XCom and privileged users can reach that network path. Treat as a targeted availability risk. It is not marked actively exploited, but critical MySQL clusters on old 5.7 builds should be patched through normal vulnerability remediation channels. Mitigation focus: Apply Oracle April 2018 CPU or later vendor-supported MySQL fixes.; Check Ubuntu, Red Hat, NetApp, or other vendor advisories for packaged fixes.; Limit XCom and Group Replication access to trusted administrative networks..

Prepared: Jun 7, 2026, 13:40 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2018-2776 mapping review

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Apr 19, 2018, 02:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://security.netapp.com/advisory/ntap-20180419-0002/CVE reference · x_refsource_CONFIRM
RHSA-2018:3655CVE reference · vendor-advisory, x_refsource_REDHAT
USN-3629-1CVE reference · vendor-advisory, x_refsource_UBUNTU
USN-3629-3CVE reference · vendor-advisory, x_refsource_UBUNTU

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

Oracle CorporationMySQL Server5.7.21 and priorListed

Weakness

CWE details

No CWE listed

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