Security readout for executives and security teams
Plain-English summary
This CVE is about cleanup failure. Sentinel LDK Run-Time Environment 7.6 and earlier can leave an inbound firewall opening for TCP port 1947 after uninstall. That may preserve network exposure even when teams believe the software was removed.
Executive priority
Treat this as a hygiene and exposure-control issue. It is not reported as actively exploited, but it can leave access open after software removal, creating avoidable internal attack surface and false confidence in decommissioning.
Technical view
The installer creates a firewall rule named “Sentinel License Manager” allowing incoming private-network TCP 1947 traffic. The uninstaller fails to close that port. The issue is classified as CWE-459, incomplete cleanup. No CVSS score is provided in the source bundle.
Likely exposure
Systems that installed Sentinel LDK Run-Time Environment versions 7.6 and prior, especially systems where it was later uninstalled, may retain the firewall rule and private-network port exposure.
Exploitation context
The provided sources do not state active exploitation, and the CVE is not listed as KEV. The described exposure is inbound access from private networks to TCP 1947, not an internet-wide condition unless local firewall or network policy expands reachability.
Researcher notes
The key validation target is post-uninstall state, not only installed software presence. Evidence is limited to the CVE description and CISA ICS advisory reference; no CVSS, exploit status, or vendor fix details are included in the supplied bundle.
Mitigation direction
- Inventory Sentinel LDK Run-Time Environment versions 7.6 and prior.
- Check vendor and CISA guidance for supported remediation details.
- Remove unintended stale firewall rules after confirming business impact.
- Restrict private-network inbound access to TCP 1947 where not required.
- Document cleanup checks in uninstall or decommission procedures.
Validation and detection
- Identify hosts with current or historical Sentinel LDK Run-Time Environment installs.
- Inspect host firewalls for the “Sentinel License Manager” rule.
- Confirm whether TCP 1947 accepts inbound private-network connections.
- Verify uninstall workflows remove or disable the rule.
- Record exceptions where port 1947 is still business-required.
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-459: 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-2021-32928 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://us-cert.cisa.gov/ics/advisories/icsa-21-159-06CVE 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.
Incomplete Cleanup
Incomplete Cleanup represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.