What is CVE-2021-36724?

CVE-2021-36724 is a medium-severity vulnerability in Forescout Eservices / Envoice, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.1/10. Published 2021-12-29.

How severe is CVE-2021-36724?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Buffer overflow in Forescout Eservices / Envoice

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.

Vulnerability class: Buffer Overflow

Published 2021-12-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (10.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 10.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Forescout Eservices / Envoice — versions SecureConnector 11.0.4.1024
Forescout Secureconnector — versions 11.0.4.1024

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

www.gov.il/en/departments/faq/cve_advisories (Third Party Advisory)

Frequently asked questions

What is CVE-2021-36724?: CVE-2021-36724 is a medium-severity vulnerability in Forescout Eservices / Envoice, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.1/10. Published 2021-12-29.
How severe is CVE-2021-36724?: Medium severity. CVSS v3 base score is 6.1 out of 10.