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4.9

Oracle MySQL Server Hangs or Crashes if Attacked

CVE-2021-35636 · published 5 years ago
Summary

MySQL Server versions 8.0.26 and earlier are at risk of being shut down or crashing if an attacker with high privileges and network access exploits this vulnerability. This could impact business operations and data availability. To stay secure, update to the latest version of MySQL Server.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
oracle mysql >= 8.0.0, <= 8.0.26
cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*
netapp oncommand_insight All versions
cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:*
netapp snapcenter All versions
cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:*
Original advisory text
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.26 and prior. Easily exploitable vulnerability allows high pri...
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.26 and prior. 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 3.1 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
4.9 Medium
Exploitation
2% chance of attack within 30 days
Timeline
Published20 Oct 2021
Updated3 Nov 2026
First seen9 Jul 2026
Sources
CVE-2021-35636 · OSV
CVE-2021-35636 · NVD
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