How severe is CVE-2021-32928?

CVE-2021-32928 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-32928 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-32928?

CVE-2021-32928 affects Thalesgroup Sentinel Ldk Run-time Environment. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-32928?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-32928 published?

CVE-2021-32928 was published on 2021-06-16 and last updated on 2026-06-17.

CVE-2021-32928

CVE-2021-32928 is a critical-severity vulnerability in Thalesgroup Sentinel Ldk Run-time Environment with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-459.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-459
Affected product: Thalesgroup Sentinel Ldk Run-time Environment
Published: 2021-06-16
Last modified: 2026-06-17

Description

The Sentinel LDK Run-Time Environment installer (Versions 7.6 and prior) adds a firewall rule named “Sentinel License Manager” that allows incoming connections from private networks using TCP Port 1947. While uninstalling, the uninstaller fails to close Port 1947.

Frequently asked questions

What is CVE-2021-32928?: The Sentinel LDK Run-Time Environment installer (Versions 7.6 and prior) adds a firewall rule named “Sentinel License Manager” that allows incoming connections from private networks using TCP Port 1947. While uninstalling, the uninstaller fails to close Port 1947.
How severe is CVE-2021-32928?: CVE-2021-32928 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-32928 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-32928?: CVE-2021-32928 affects Thalesgroup Sentinel Ldk Run-time Environment. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-32928?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-32928 published?: CVE-2021-32928 was published on 2021-06-16 and last updated on 2026-06-17.

References

https://us-cert.cisa.gov/ics/advisories/icsa-21-159-06

Affected products (1)

cpe:2.3:a:thalesgroup:sentinel_ldk_run-time_environment:*:*:*:*:*:*:*:*

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