CVE-2021-32928Network attack vector

Network exposure via retained uninstall firewall rule

Published Jun 16, 2021 · Updated Aug 3, 2024

Incomplete cleanup in Thales Sentinel LDK Run-time Environment 7.6 and earlier allows remote attackers to connect through TCP port 1947. On Windows, the uninstaller removes the runtime but leaves its installer-created “Sentinel License Manager” firewall rule enabled for incoming private-network traffic. The exposure remains after uninstall; published sources establish port access but no further consequence.

CVSS severity9.8
Critical
EPSS probability1.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Incomplete cleanup in Thales Sentinel LDK Run-time Environment 7.6 and earlier allows remote attackers to connect through TCP port 1947. On Windows, the uninstaller removes the runtime but leaves its installer-created “Sentinel License Manager” firewall rule enabled for incoming private-network traffic. The exposure remains after uninstall; published sources establish port access but no further consequence.

The record

CVE
CVE-2021-32928
Published
Jun 16, 2021
Updated
Aug 3, 2024
Vendor
Thales Group
Product
Sentinel LDK Run-time Environment
Classifications
CWE-459
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 16, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Versions 7.6 and prior

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Thales Group · Sentinel LDK Run-time Environmentversion=Versions 7.6 and prior

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-459Incomplete Cleanup

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo