Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: PS). 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).
CVE-2021-35637
MEDIUMNVD 4.94.9—
EchelonGraph scoreMEDIUM confidence
This medium-severity CVE scores 4.9 under NVD CVSS v3. EPSS exploit probability: 2.0%, top 21% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, nvd
4.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 4.9Exploit: None knownExposed: 0
A fix is available — apply it.
- CVSS v3
- 4.9
- EG Score
- 4.9(medium)
- EG Risk
- 23(Track)EG Risk 23/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity49% × 45%Exploitation2% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 2%
- EPSS %ILE
- 80%
- KEV
- Not listed
Published
October 20, 2021
Last Modified
November 21, 2024
References (4)
- secalert_us@oraclehttps://security.netapp.com/advisory/ntap-20211022-0003/
- secalert_us@oraclehttps://www.oracle.com/security-alerts/cpuoct2021.html
- af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20211022-0003/
- af854a3a-2127-422b-91ae-364da2661108https://www.oracle.com/security-alerts/cpuoct2021.html
Patch Availability(3)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | mysql-source-8.0 (8.0.27-0ubuntu0.21.10.1) @ impish | 2026-05-26 | ubuntu |
| redhat | mysql:8.0-8060020220830124159.ad008a3a | 2022-10-25 | redhat |
| redhat | rh-mysql80-mysql-0:8.0.30-1.el7 | 2022-09-14 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
All Vendor Advisories
(4)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
- Microsoft MSRCCVE-2021-356372021-10-26
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: PS). 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).
- Red HatRHSA-2022:6518MODERATE2021-10-19
RHSA-2022:6518 — Moderate
- Red HatRHSA-2022:7119MODERATE2021-10-19
RHSA-2022:7119 — Moderate
- UbuntuUSN-5123-1MEDIUM
MySQL vulnerabilities
Frequently asked(5)
What is CVE-2021-35637?
CVE-2021-35637 is a medium vulnerability published on October 20, 2021. Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: PS). 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…
When was CVE-2021-35637 disclosed?
CVE-2021-35637 was first published in the National Vulnerability Database on October 20, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-35637 actively exploited?
CVE-2021-35637 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 19.9% of all scored CVEs.
What is the CVSS score of CVE-2021-35637?
CVE-2021-35637 has a CVSS v3 base score of 4.9 (NVD).
How do I remediate CVE-2021-35637?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-35637, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2021-35637
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