How severe is CVE-2021-36724?

CVE-2021-36724 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2021-36724 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-36724?

CVE-2021-36724 affects Forescout Secureconnector. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-36724?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-36724 published?

CVE-2021-36724 was published on 2021-12-29 and last updated on 2026-06-17.

CVE-2021-36724

CVE-2021-36724 is a medium-severity vulnerability in Forescout Secureconnector with a CVSS 3.x base score of 6.1. 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-120.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 2.1
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Forescout Secureconnector
Published: 2021-12-29
Last modified: 2026-06-17

Description

ForeScout - SecureConnector Local Service DoS - A low privilaged user which doesn't have permissions to shutdown the secure connector service writes a large amount of characters in the installationPath. This will cause the buffer to overflow and override the stack cookie causing the service to crash.

Frequently asked questions

What is CVE-2021-36724?: ForeScout - SecureConnector Local Service DoS - A low privilaged user which doesn't have permissions to shutdown the secure connector service writes a large amount of characters in the installationPath. This will cause the buffer to overflow and override the stack cookie causing the service to crash.
How severe is CVE-2021-36724?: CVE-2021-36724 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2021-36724 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36724?: CVE-2021-36724 affects Forescout Secureconnector. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-36724?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-36724 published?: CVE-2021-36724 was published on 2021-12-29 and last updated on 2026-06-17.

References

https://www.gov.il/en/departments/faq/cve_advisories

Affected products (1)

cpe:2.3:a:forescout:secureconnector:11.0.4.1024:*:*:*:*:*:*:*

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