Vulnerability
CVE-2017-3645
CVE-2017-3645 is a medium-severity vulnerability (CVSS v3.0 4.9). As of 2026-10-11, 35 490 hosts in our data show software it affects on an open service in at least 15 countries.
Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Optimizer). Supported versions that are affected are 5.7.18 and earlier. Easily exploitable vulnerability allows high privileged attacker with network access via multiple protocols 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).
- Published
- 2017-08-08
- Last modified
- 2026-06-17
- CVSS score
- 4.9 CVSS v3.0
- CVSS vector (v3.0)
- CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
- Exploit likelihood (EPSS)
- 2.4% in the next 30 days (top 17% of CVEs)
Exposure in our data
35 490 hosts
Hosts whose banner shows an affected software version on a service open at their latest check.
Not counted: 712 hosts with this CVE only from an older observation.
Not counted: 2 hosts where the software version is too vague to tell (only a major release).
Not counted: 923 more on distribution builds that may be patched (the distribution may have backported the fix without changing the version).
825 more hosts had it earlier (the software version has since changed or the service is gone).
Counted 2026-10-11 04:20 UTC
By country
| China CN | 22 617 |
| United States US | 4 088 |
| Hong Kong HK | 1 664 |
| South Korea KR | 1 257 |
| Russia RU | 794 |
| Japan JP | 766 |
| Singapore SG | 530 |
| Türkiye TR | 528 |
| India IN | 460 |
| Taiwan TW | 286 |
| Brazil BR | 267 |
| Malaysia MY | 226 |
| Serbia RS | 226 |
| Indonesia ID | 221 |
| Canada CA | 184 |
Affected software seen
| mysql 5.6.50 | 5 733 |
| mysql 5.6.51 | 4 654 |
| mysql 5.5.62 | 3 259 |
| mysql 5.1.73 | 2 011 |
| mysql 5.6.16 | 1 575 |
| mysql 5.5.18.1 | 770 |
| mysql 5.7.17 | 681 |
| mysql 5.6.25 | 515 |
| mysql 5.6.49 | 497 |
| mysql 5.7.12 | 463 |
| mysql 5.7.18 | 405 |
| mysql 5.6.43 | 376 |