CVE-2020-14799 [Medium] | Denial of Service in Mysql

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Security: Encryption). Supported versions that are affected are 8.0.20 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).

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.23%	1.28%	+1.05%
2	2026-01-24	0.31%	0.23%	-0.07%
3	2025-11-21	—	0.31%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.23%

1.28%

+1.05%

2026-01-24

0.31%

0.23%

-0.07%

2025-11-21

—

0.31%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
4.9	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:H) They need powerful rights—admin, root, or similar—before this pays off. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.2	3.6	[email protected]
4.0	2.0	MEDIUM	`AV:N/AC:L/Au:S/C:N/I:N/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:S) A single authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:P) Partial availability impact.	8.0	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

4.9

3.1

MEDIUM

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

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H): They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.2

3.6

[email protected]

4.0

2.0

MEDIUM

AV:N/AC:L/Au:S/C:N/I:N/A:P Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:S): A single authentication is required.
Confidentiality impact (C:N): No confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:P): Partial availability impact.

8.0

2.9

[email protected]

OS Trackers for CVE-2020-14799

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2020-14799 not yet assigned priority: Debian including 1 source packages (mysql-8.0), 1 status rows across 1 suites (sid): resolved 1.	https://security-tracker.debian.org/tracker/CVE-2020-14799
`gentoo`	normal	CVE-2020-14799: 1 GLSA(s) (202105-27), 2 atom(s) (dev-db/mysql, dev-db/mysql-connector-c); latest impact normal.	https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2020-14799
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2020-14799
`ubuntu`	medium	CVE-2020-14799 medium priority: Ubuntu including 11 source packages (mariadb-10.0, mariadb-10.1, …), 177 status rows across 17 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, vivid, xenial): DNE 147, not-affected 19, needs-triage 5, ignored 2, needed 2, released 2.	https://ubuntu.com/security/CVE-2020-14799

Affected software / configurations for CVE-2020-14799

Vendor	Product	Version	Raw CPE
oracle	mysql	>= 8.0.0, <= 8.0.20	cpe:2.3:a:oracle:mysql::::::::
netapp	active_iq_unified_manager	>= 7.3	cpe:2.3:a:netapp:active_iq_unified_manager::::::windows::*
netapp	active_iq_unified_manager	>= 9.5	cpe:2.3:a:netapp:active_iq_unified_manager::::::vmware_vsphere::*
netapp	oncommand_insight	—	cpe:2.3:a:netapp:oncommand_insight:-:::::::*
netapp	oncommand_workflow_automation	—	cpe:2.3:a:netapp:oncommand_workflow_automation:-:::::::*
netapp	snapcenter_server	—	cpe:2.3:a:netapp:snapcenter_server:-:::::::*

References for CVE-2020-14799

URL	Tags
https://security.gentoo.org/glsa/202105-27	Third Party Advisory
https://security.netapp.com/advisory/ntap-20201023-0003/	Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2020.html	Patch Vendor Advisory

URL

CVE-2020-14799

Exploit prediction scoring system (EPSS) score for CVE-2020-14799

Common vulnerability scoring system (CVSS) metrics for CVE-2020-14799

Weakness enumeration for CVE-2020-14799

OS Trackers for CVE-2020-14799

Affected software / configurations for CVE-2020-14799

References for CVE-2020-14799