CVE-2021-37851 | Local Privilege Escalation in ESET product for Windows

Local privilege escalation in Windows products of ESET allows user who is logged into the system to exploit repair feature of the installer to run malicious code with higher privileges. This issue affects: ESET, spol. s r.o. ESET NOD32 Antivirus 11.2 versions prior to 15.1.12.0. ESET, spol. s r.o. ESET Internet Security 11.2 versions prior to 15.1.12.0. ESET, spol. s r.o. ESET Smart Security Premium 11.2 versions prior to 15.1.12.0. ESET, spol. s r.o. ESET Endpoint Antivirus 6.0 versions prior to 9.0.2046.0; 6.0 versions prior to 8.1.2050.0; 6.0 versions prior to 8.0.2053.0. ESET, spol. s r.o. ESET Endpoint Security 6.0 versions prior to 9.0.2046.0; 6.0 versions prior to 8.1.2050.0; 6.0 versions prior to 8.0.2053.0. ESET, spol. s r.o. ESET Server Security for Microsoft Windows Server 8.0 versions prior to 9.0.12012.0. ESET, spol. s r.o. ESET File Security for Microsoft Windows Server 8.0.12013.0. ESET, spol. s r.o. ESET Mail Security for Microsoft Exchange Server 6.0 versions prior to 8.0.10020.0. ESET, spol. s r.o. ESET Mail Security for IBM Domino 6.0 versions prior to 8.0.14011.0. ESET, spol. s r.o. ESET Security for Microsoft SharePoint Server 6.0 versions prior to 8.0.15009.0.

Published: 2022-05-11 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-37851 is rated Low Risk (32/100): CVSS High severity, with low exploitation likelihood (EPSS 0.03%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-37851

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-07-11 0.05% 0.03% -0.02%
2 2025-03-17 0.04% 0.05% +0.01%
3 2023-03-07 — 0.04% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-37851

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.3 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
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:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.3 5.9 [email protected]
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
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:L)
A normal user session is enough; they don’t have to be admin.
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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
7.2 2.0 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 10.0 [email protected]

Weakness enumeration for CVE-2021-37851

Affected software / configurations for CVE-2021-37851

Vendor Product Version Raw CPE
eset endpoint_antivirus >= 6.0, < 8.0.2053.0 cpe:2.3:a:eset:endpoint_antivirus:*:*:*:*:*:windows:*:*
eset endpoint_antivirus >= 8.1, < 8.1.2050.0 cpe:2.3:a:eset:endpoint_antivirus:*:*:*:*:*:windows:*:*
eset endpoint_antivirus >= 9.0, < 9.0.2046.0 cpe:2.3:a:eset:endpoint_antivirus:*:*:*:*:*:windows:*:*
eset endpoint_security >= 6.0, < 8.0.2053.0 cpe:2.3:a:eset:endpoint_security:*:*:*:*:*:windows:*:*
eset endpoint_security >= 8.1, < 8.1.2050.0 cpe:2.3:a:eset:endpoint_security:*:*:*:*:*:windows:*:*
eset endpoint_security >= 9.0, < 9.0.2046.0 cpe:2.3:a:eset:endpoint_security:*:*:*:*:*:windows:*:*
eset file_security >= 6.0, < 8.0.12013.0 cpe:2.3:a:eset:file_security:*:*:*:*:*:windows_server:*:*
eset internet_security >= 11.2, < 15.1.12.0 cpe:2.3:a:eset:internet_security:*:*:*:*:*:windows:*:*
eset mail_security >= 6.0, < 8.0.10020.0 cpe:2.3:a:eset:mail_security:*:*:*:*:*:exchange_server:*:*
eset mail_security >= 6.0, < 8.0.14011.0 cpe:2.3:a:eset:mail_security:*:*:*:*:*:domino:*:*
eset nod32_antivirus >= 11.2, < 15.1.12.0 cpe:2.3:a:eset:nod32_antivirus:*:*:*:*:*:windows:*:*
eset security >= 6.0, < 8.0.15009.0 cpe:2.3:a:eset:security:*:*:*:*:*:sharepoint_server:*:*
eset server_security >= 6.0 cpe:2.3:a:eset:server_security:*:*:*:*:*:azure:*:*
eset server_security >= 8.0, < 9.0.12012.0 cpe:2.3:a:eset:server_security:*:*:*:*:*:windows_server:*:*
eset smart_security >= 11.2, < 15.1.12.0 cpe:2.3:a:eset:smart_security:*:*:*:*:premium:windows:*:*

References for CVE-2021-37851

URL Tags
https://support.eset.com/en/ca8268 Vendor Advisory
cvelogic Threat Intelligence