Security readout for executives and security teams
Plain-English summary
This flaw lets a logged-in Windows user abuse the ESET installer repair feature to run malicious code with higher privileges. It is not a remote internet attack, but it can turn a low-privilege foothold into full system compromise on affected endpoints or servers.
Executive priority
Treat this as high priority where affected ESET products run on Windows endpoints or servers. It is not described as remotely exploitable, but it can materially increase impact after an attacker gains a local account or user session.
Technical view
CVE-2021-37851 is a local privilege escalation in multiple ESET Windows products. The CVSS 3.1 score is 7.3 high, with local access, low complexity, low privileges, and user interaction required. The issue is mapped to CWE-280 and affects listed versions before ESET’s fixed release thresholds.
Likely exposure
Exposure is limited to Windows systems running the named ESET consumer, endpoint, server, mail, Domino, or SharePoint security products below the fixed versions. Risk is higher on shared workstations, terminal servers, and servers where non-admin users can log in interactively.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Exploitation requires a user already logged into the Windows system and interaction with the installer repair feature, so it is mainly a post-compromise or insider privilege escalation risk.
Researcher notes
The key security boundary issue is improper handling of privileges during installer repair behavior. The bundle does not provide exploit details, indicators of compromise, or independent exploitation evidence. Validation should focus on product/version matching and local-user exposure rather than network scanning alone.
Mitigation direction
- Upgrade affected ESET products to the fixed or later versions listed in the advisory.
- Consult ESET advisory CA8268 for product-specific upgrade guidance.
- Prioritize shared Windows systems and servers with interactive non-admin users.
- Reduce unnecessary local interactive access on affected systems until updated.
- Track remediation separately for endpoint, server, mail, Domino, and SharePoint products.
Validation and detection
- Inventory Windows systems running the listed ESET products.
- Compare installed versions against the fixed thresholds in the CVE and vendor advisory.
- Confirm each remediated host reports a fixed or later ESET version.
- Identify affected systems that allow non-admin interactive logon.
- Check vulnerability management records for any unresolved affected ESET assets.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-280: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-37851 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H1.35.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.3HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://support.eset.com/en/ca8268CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Handling of Insufficient Permissions or Privileges
Improper Handling of Insufficient Permissions or Privileges represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.