CVE-2023-5594 [High] | Security Vulnerability in Endpoint Antivirus

CVE-2023-5594 is rated Low Risk (37.5/100): CVSS High severity, with low exploitation likelihood (EPSS 0.05%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2024-11-20	0.04%	0.05%	+0.01%
2	2023-12-22	—	0.04%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2024-11-20

0.04%

0.05%

+0.01%

2023-12-22

—

0.04%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.1	HIGH	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N` 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:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:N) Service keeps running; no real outage angle.	2.2	4.7	[email protected]
8.6	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N` 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:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:N) Service keeps running; no real outage angle.	3.9	4.0	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.5

3.1

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N 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:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:L): Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N): Service keeps running; no real outage angle.

2.2

4.7

[email protected]

8.6

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N 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:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N): Service keeps running; no real outage angle.

3.9

4.0

[email protected]

Affected software / configurations for CVE-2023-5594

Vendor	Product	Version	Raw CPE
eset	endpoint_antivirus	>= 10.0	cpe:2.3:a:eset:endpoint_antivirus::::::linux::*
eset	endpoint_antivirus	—	cpe:2.3:a:eset:endpoint_antivirus:-:::::windows::
eset	endpoint_security	—	cpe:2.3:a:eset:endpoint_security:-:::::windows::
eset	file_security	—	cpe:2.3:a:eset:file_security:-:::::azure::
eset	internet_security	—	cpe:2.3:a:eset:internet_security:-:::::::*
eset	mail_security	—	cpe:2.3:a:eset:mail_security:-:::::domino::
eset	mail_security	—	cpe:2.3:a:eset:mail_security:-:::::exchange_server::
eset	nod32_antivirus	—	cpe:2.3:a:eset:nod32_antivirus:-:::::::*
eset	security	—	cpe:2.3:a:eset:security:-:::::sharepoint_server::
eset	security	—	cpe:2.3:a:eset:security:-::::ultimate:::
eset	server_security	>= 10.1	cpe:2.3:a:eset:server_security::::::linux::*
eset	server_security	—	cpe:2.3:a:eset:server_security:-:::::windows_server::
eset	smart_security	—	cpe:2.3:a:eset:smart_security:-::::premium:::

References for CVE-2023-5594

URL	Tags
https://support.eset.com/en/ca8562-eset-customer-advisory-improper-following-of-a-certificates-chain-of-trust-in-eset-security-products-fixed	Vendor Advisory

URL

CVE-2023-5594 | Improper following of a certificate's chain of trust in ESET security products

Exploit prediction scoring system (EPSS) score for CVE-2023-5594

Common vulnerability scoring system (CVSS) metrics for CVE-2023-5594

Weakness enumeration for CVE-2023-5594

Affected software / configurations for CVE-2023-5594

References for CVE-2023-5594