What is CVE-2020-11633?

CVE-2020-11633 is a critical-severity vulnerability in Zscaler Client_connector, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-07-15.

How severe is CVE-2020-11633?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Zscaler Client_connector

CVE-2020-11633

The Zscaler Client Connector for Windows prior to 2.1.2.74 had a stack based buffer overflow when connecting to misconfigured TLS servers. An adversary would potentially have been able to execute arbitrary code with system privileges.

Vulnerability class: Buffer Overflow

EPSS: 0.019 (77.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Zscaler Client_connector
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

cve@zscaler.com (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2020-11633?: CVE-2020-11633 is a critical-severity vulnerability in Zscaler Client_connector, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-07-15.
How severe is CVE-2020-11633?: Critical severity. CVSS v3 base score is 9.8 out of 10.