Security readout for executives and security teams
Plain-English summary
CVE-2021-38449 is a critical memory-write flaw in AUVESY Versiondog. Public records say some API functions let a client choose buffer parameters, allowing memory to be rewritten in the affected product. Because the CVSS vector is network-based, unauthenticated, and no user interaction is required, exposed systems should be treated as high business risk.
Executive priority
Treat this as urgent if Versiondog is deployed, especially in industrial or operational environments. The issue has critical severity and needs no authentication per CVSS, but the provided sources do not confirm exploitation or a specific patch.
Technical view
The issue is classified as CWE-123, a write-what-where condition. The CVE description says client-controlled API parameters can write or copy data into a supplied buffer, potentially rewriting arbitrary memory in Versiondog. The published CVSS 3.1 score is 9.8 with high confidentiality, integrity, and availability impact.
Likely exposure
The source bundle lists AUVESY Versiondog, all versions, as affected. Highest concern is any Versiondog deployment whose API surface is reachable from untrusted networks. The bundle does not provide CPEs, deployment prerequisites, or a confirmed fixed version.
Exploitation context
The CVSS vector indicates network attackability, low complexity, no privileges, and no user interaction. CISA KEV status is false in the supplied data, so there is no provided evidence of known active exploitation. No public exploit details are included in the bundle.
Researcher notes
Analysis is limited to the supplied CVE and CISA reference metadata. The affected range is broad: all versions. Validate with the CISA ICS advisory and vendor materials before asserting exploitability details, fixes, or environment-specific impact.
Mitigation direction
- Check the CISA ICS advisory and AUVESY guidance for current remediation details.
- Inventory all Versiondog deployments and owners immediately.
- Remove untrusted network reachability to Versiondog API surfaces where possible.
- Apply vendor-provided updates or compensating controls when identified.
- Document any exception where affected Versiondog remains reachable.
Validation and detection
- Confirm whether AUVESY Versiondog is deployed in production or OT environments.
- Identify network paths that can reach Versiondog API services.
- Verify deployed versions against vendor and CISA guidance.
- Check monitoring for unusual access to Versiondog services.
- Record remediation status, residual exposure, and accountable owner.
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-123: 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-2021-38449 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
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/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:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
Write-what-where Condition
Write-what-where Condition represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.