CVE-2021-35577

FAUCET Score

CVE-2021-35577 is a denial-of-service vulnerability affecting Oracle MySQL Server versions 8.0.26 and prior, specifically within the Optimizer component. A highly privileged attacker with network access can exploit this vulnerability via the MySQL Protocol, leading to a complete and repeatable crash of the MySQL Server. Rated with a CVSS 3.1 Base Score of 4.9 (Medium), the attack is low complexity but requires high privileges, impacting only availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		Range not provided by sourceCPE matchmatch criteria	cpe:2.3:a:netapp:oncommand_insight:-:::::::*
		Range not provided by sourceCPE matchmatch criteria	cpe:2.3:a:netapp:snapcenter:-:::::::*
		>= 8.0.0, <= 8.0.26CPE matchmatch criteria	cpe:2.3:a:oracle:mysql::::::::
		33CPE matchmatch criteria	cpe:2.3:o:fedoraproject:fedora:33:::::::*
		34CPE matchmatch criteria	cpe:2.3:o:fedoraproject:fedora:34:::::::*

CVSS Data

CVSS version used by this source: 3.1

4.9MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

Exploitability Score

1.2

Impact Score

3.6

CvssVersion

3.1

Exploit Intelligence

EPSS Score

2.13%

Probability of exploitation in next 30 days

EPSS Percentile

80.0%

Percentile rank of EPSS score among Peer Group

As of 2026-07-28

Model: v2026.06.15

This CVE's current EPSS score of 0.0213 is in the 89th percentile among its peer group of 3,566 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 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

microsoftpatch availablevia msrc

Product: CBL Mariner 2.0 ARMFixed in: 8.0.28-1

microsoftpatch availablevia msrc

Product: cbl2 mysql 8.0.28-1 on CBL Mariner 2.0Fixed in: 8.0.28-1

microsoftpatch availablevia msrc

Product: 18806-16823Fixed in: 8.0.28-1

microsoftpatch availablevia msrc

Product: CBL Mariner 2.0 x64Fixed in: 8.0.28-1

oraclepatch availablevia nvd_reference

View patch

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-mysql80-mysql-0:8.0.30-1.el7

View patch

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8Fixed in: mysql:8.0-8060020220830124159.ad008a3a

View patch

Vendor Advisories (3)

microsoft2021-Dec/CVE-2021-35577

CVE-2021-35577

Dec 14, 2021

redhatCVE-2021-35577Moderate

mysql: Server: Optimizer unspecified vulnerability (CPU Oct 2021)

Oct 19, 2021

microsoft2021-Oct/CVE-2021-35577Moderate

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 MySQL Protcol 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).

Oct 12, 2021

References

lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/5MLAXYFLUDC636S46X34USCLDZAOFBM2

lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/PRCU3RTIPVKPC3GMC76YW7DJEXUEY6FG

lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/XF3ZFPL3JJ26YRUGXLXQZYJBLZV3WC2C

security.netapp.com / advisory/ntap-20211022-0003

Third Party Advisory

oracle.com / security-alerts/cpuoct2021.html

PatchVendor Advisory