Security readout for executives and security teams
Plain-English summary
Some ESET Windows security products contained a local privilege escalation flaw. A person or malware already able to run as a low-privileged user on the machine could abuse pipe client impersonation to gain NT AUTHORITY\SYSTEM privileges, effectively taking control of that Windows host. This is high urgency for endpoints and servers running the listed versions.
Executive priority
Treat this as a high-priority patching issue where affected ESET products run on important Windows assets. It is not a remote entry point, but it can turn a limited local compromise into full host control, increasing ransomware and lateral movement risk.
Technical view
The issue is improper handling of named pipe client impersonation in ESET products for Windows. The CVSS 3.1 vector is local, low complexity, low privileges required, no user interaction, and high confidentiality, integrity, and availability impact. The bundle identifies specific affected versions across consumer, endpoint, server, Azure, SharePoint, Domino, and Exchange security products.
Likely exposure
Exposure is limited to Windows hosts running the specific ESET product versions named in the CVE bundle. Internet exposure is not the main issue; the risk is post-compromise privilege escalation on managed workstations, servers, and mail or collaboration infrastructure where affected ESET software is installed.
Exploitation context
The provided sources do not show CISA KEV listing or confirmed active exploitation. Exploitation requires local code execution with low privileges, making this most relevant after phishing, malware execution, stolen credentials, or insider access. Successful abuse would elevate privileges to SYSTEM.
Researcher notes
The available record describes a local pipe impersonation issue but does not include exploit mechanics, fixed version numbers, or observed exploitation evidence. Research should focus on version validation, vendor advisory details, and defensive telemetry for unexpected SYSTEM-level activity originating from low-privileged processes.
Mitigation direction
- Check ESET's advisory for fixed builds and product-specific upgrade guidance.
- Upgrade affected ESET Windows products from the listed vulnerable versions.
- Prioritize servers, Exchange, SharePoint, Azure, and widely deployed endpoint installations.
- Restrict local user privileges and monitor untrusted process execution on affected hosts.
- If upgrades are delayed, ask ESET support for supported mitigations.
Validation and detection
- Inventory Windows hosts with ESET products and record exact product versions.
- Compare installed versions against the affected versions in the CVE bundle.
- Confirm upgraded hosts are no longer running the listed vulnerable builds.
- Review EDR logs for suspicious local privilege escalation behavior on affected systems.
- Track remediation separately for endpoints, servers, and mail or collaboration systems.
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.
CVE-2021-37852 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
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/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:N/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://support.eset.com/en/ca8223-local-privilege-escalation-vulnerability-fixed-in-eset-products-for-windowsCVE reference · x_refsource_MISC
- https://www.zerodayinitiative.com/advisories/ZDI-22-148/CVE 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.