Security readout for executives and security teams
Plain-English summary
Versiondog’s proprietary CSC protocol can be asked to read data from unintended memory locations because an offset value is not properly checked. The main business concern is confidentiality: a low-privileged client may be able to read sensitive out-of-bounds data under specific conditions.
Executive priority
Treat this as a confidentiality risk for Versiondog environments, especially in OT settings. It is not KEV-listed and has medium CVSS severity, but affected scope is broad in the bundle, so asset owners should verify exposure and follow vendor guidance.
Technical view
CVE-2021-38451 is a CWE-125 out-of-bounds read in AUVESY Versiondog. CSC protocol function calls accept parameters, but the offset value is not sanitized, allowing arbitrary offsets and out-of-bounds reads. CVSS 3.1 is 4.8 with network attack vector, high complexity, low privileges, and user interaction required.
Likely exposure
Exposure is limited to environments running AUVESY Versiondog. The source bundle says all versions are affected, but it does not identify specific components, ports, deployment modes, or fixed releases.
Exploitation context
The CVSS vector indicates remote network reachability, high attack complexity, low required privileges, and required user interaction. CISA KEV status is false in the bundle, and no provided source states active exploitation.
Researcher notes
Evidence is narrow: the bundle provides the vulnerability class, CVSS vector, affected product, and CISA advisory link, but no exploit details, fixed version, or operational indicators. Avoid assuming affected ports, exploit maturity, or remediation specifics beyond vendor verification.
Mitigation direction
- Check AUVESY and CISA guidance for fixed versions or vendor-approved mitigations.
- Inventory Versiondog deployments and confirm whether CSC protocol access is required.
- Restrict Versiondog access to authorized management users and trusted networks.
- Prioritize remediation where Versiondog handles sensitive OT or automation data.
Validation and detection
- Identify installed Versiondog versions and compare them with vendor guidance.
- Review network paths that can reach Versiondog CSC services.
- Confirm which users or clients have Versiondog protocol access.
- Check logs for unexpected Versiondog protocol activity where available.
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-125: 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 lookupCVE-2021-38451 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
- Medium
- CVSS
- 4.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
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:H/PR:L/UI:R/S:U/C:H/I:N/A:N1.23.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.8MediumVector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://us-cert.cisa.gov/ics/advisories/icsa-21-292-01CVE reference · x_refsource_CONFIRM
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.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.