Security readout for executives and security teams
Plain-English summary
WinAVR 20100110 may install with overly permissive folder permissions. A logged-in user could alter WinAVR program files, including DLLs or executables, which could let malicious code run when the software is used. This is most urgent where WinAVR is installed on shared developer workstations, build systems, or machines used by multiple users.
Executive priority
Treat as high priority for developer and build environments. The business risk is tampering with trusted tooling, which can undermine builds or developer workstations. If WinAVR is rare or retired internally, priority drops after confirming absence. Focus first on shared systems and systems involved in software delivery.
Technical view
CVE-2020-36938 is a CWE-732 improper permission assignment issue in WinAVR 20100110. The source bundle states authenticated users can modify files in the WinAVR installation directory, potentially affecting executables and DLLs. CVSS is 8.8 high with low complexity and low privileges required. Public exploit material is referenced, but the CVE is not listed as KEV.
Likely exposure
Exposure is likely limited to environments that still run WinAVR version 20100110, especially Windows developer endpoints or build hosts. Systems with single trusted users are less exposed than shared machines. The provided sources do not identify other affected versions or a vendor-fixed release.
Exploitation context
An attacker needs authenticated access according to the source bundle. The issue is local permission abuse against installed files, not confirmed active exploitation. Exploit-DB is listed as a public exploit reference, which raises validation priority, but KEV status is false and no source here confirms in-the-wild exploitation.
Researcher notes
The provided data identifies WinAVR 20100110 only. No affected CPEs, fixed version, or vendor patch details are supplied. CVSS indicates network attack vector, but the described weakness is authenticated modification of local installation files. Validate actual permissions in deployed installations and avoid assuming other versions are affected without evidence.
Mitigation direction
- Inventory systems for WinAVR version 20100110.
- Check vendor or project guidance for any updated installer or replacement.
- Restrict WinAVR installation directory write permissions to administrators only.
- Remove WinAVR where it is no longer required.
- Prioritize shared workstations and build systems for remediation.
Validation and detection
- Confirm whether WinAVR 20100110 is installed.
- Review the WinAVR installation directory permissions.
- Verify standard authenticated users cannot modify DLL or executable files.
- Check software inventory for shared developer or build hosts.
- Document any compensating controls and remaining writable paths.
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-732: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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 lookupCVE-2020-36938 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
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/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:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-49379CVE reference · exploit
- WinAVR Official Project HomepageCVE reference · product
- VulnCheck Advisory: WinAVR Version 20100110 - Insecure Folder PermissionsCVE reference · third-party-advisory
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.
Incorrect Permission Assignment for Critical Resource
Incorrect Permission Assignment for Critical Resource represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.