CVE-2016-6663
A public proof of concept exists; no exploitation attested.
- Published2016-12-13
- WeaknessCWE-362
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Race condition in Oracle MySQL before 5.5.52, 5.6.x before 5.6.33, 5.7.x before 5.7.15, and 8.x before 8.0.1; MariaDB before 5.5.52, 10.0.x before 10.0.28, and 10.1.x before 10.1.18; Percona Server before 5.5.51-38.2, 5.6.x before 5.6.32-78-1, and 5.7.x before 5.7.14-8; and Percona XtraDB Cluster before 5.5.41-37.0, 5.6.x before 5.6.32-25.17, and 5.7.x before 5.7.14-26.17 allows local users with certain permissions to gain privileges by leveraging use of my_copystat by REPAIR TABLE to repair a MyISAM table.
Timeline
dates in UTC- 2016-12-1321:59CVE publishedNVD
- 2026-10-2319:23First public proof of conceptPoC-in-GitHub
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2016-6663?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-6663?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 5.5 | ≥ 5.5.0, ≤ 5.5.52 | no fix published | NVD |
| 5.6 | ≥ 5.6.0, ≤ 5.6.33 | no fix published | NVD |
| 5.7 | ≥ 5.7.0, ≤ 5.7.15 | no fix published | NVD |
| 8.0 | = 8.0 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 10.1 | ≥ 10.1.0, < 10.1.18 | 10.1.18 | NVD |
| 10.0 | ≥ 10.0.0, < 10.0.28 | 10.0.28 | NVD |
| 5.5 | ≥ 5.5.20, < 5.5.52 | 5.5.52 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 5.7 | ≥ 5.7, < 5.7.14-8 | 5.7.14-8 | NVD |
| 5.6 | ≥ 5.6, < 5.6.32-78.1 | 5.6.32-78.1 | NVD |
| 5.5 | ≥ 5.5, < 5.5.51-38.2 | 5.5.51-38.2 | NVD |
1 more product in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
Advisories and patches
- www.oracle.comPatch · Vendor Advisory
- dev.mysql.comVendor Advisory
- dev.mysql.comVendor Advisory
- dev.mysql.comVendor Advisory
- dev.mysql.comVendor Advisory
- github.comPatch
Detection
read 2026-10-23 19:23 UTC- Nuclei template
- none so far ProjectDiscovery
Sources
- NVDCVSS 3.07read 2026-10-23
- NVDCVSS 2.04.4read 2026-10-23
- NVDweakness (CWE)CWE-362read 2026-10-23
- FIRST EPSSEPSS score4.3 %2026-10-22
- PoC-in-GitHubproof of concept1read 2026-10-23
- Exploit-DBdetectionread 2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Published
- 2016-12-13
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2016-6663?
Is CVE-2016-6663 actively exploited?
What is the CVSS score for CVE-2016-6663?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.