Security readout for executives and security teams
Plain-English summary
CVE-2021-43939 lets a lower-privileged SmartPTT user reach higher-level administration functions by sending requests directly to protected endpoints. For an organization using SmartPTT 1.1, this can turn an internal low-privilege account into a broad confidentiality, integrity, and availability risk.
Executive priority
Treat as high priority where SmartPTT 1.1 supports operational communications. The issue is not listed as known exploited in the supplied data, but the potential impact spans confidentiality, integrity, and availability.
Technical view
Elcomplus SmartPTT 1.1 has improper authorization, mapped to CWE-285. The CVSS 3.1 vector is 8.8 high: AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H. The issue requires low privileges and no user interaction, with direct endpoint access bypassing intended authorization boundaries.
Likely exposure
Exposure is specific to Elcomplus SmartPTT version 1.1 in the supplied sources. The CVSS vector indicates local access and low privileges are required. The bundle does not identify affected later versions, deployment modes, or internet-exposed conditions.
Exploitation context
The provided bundle does not indicate CISA KEV listing or active exploitation. The risk remains material because a low-authenticated user could access higher administration authorization, potentially affecting sensitive radio-dispatch operations if SmartPTT is operationally important.
Researcher notes
Evidence is limited to the CVE record, CVE List entry, and CISA ICS advisory reference. No exploit details, patch version, or detailed remediation text is present in the supplied bundle, so validation should focus on version confirmation and authorization-boundary testing without weaponization.
Mitigation direction
- Inventory Elcomplus SmartPTT deployments and confirm whether version 1.1 is present.
- Review the CISA advisory and Elcomplus guidance for fixed versions or vendor mitigations.
- Limit SmartPTT access to trusted users while remediation guidance is confirmed.
- Review administrative roles and remove unnecessary low-privilege accounts.
- Monitor SmartPTT administrative activity for unexpected privilege use.
Validation and detection
- Confirm installed SmartPTT version numbers against the affected version in the CVE bundle.
- Review role definitions and endpoint access controls for low-privilege users.
- Check logs for low-privilege accounts accessing administrative functions.
- Verify whether vendor or CISA guidance identifies an upgrade or mitigation.
- Document compensating controls if no vendor fix is immediately 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-285: 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-2021-43939 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:L/AC:L/PR:L/UI:N/S:C/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:C/C:H/I:H/A:H26Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.cisa.gov/uscert/ics/advisories/icsa-22-109-04CVE 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.
Improper Authorization
Improper Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.