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CVE-2020-11633: zscaler client_connector Out-of-bounds Write

CVSS: 10.0v2.0HighModified
Published 15-07-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-11633 is a high (CVSS 10.0) Out-of-bounds Write vulnerability in zscaler client_connector. EPSS estimates a 1.89% chance of exploitation in the next 30 days, higher than 79.2% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
10.0/10
010
High · v2.0 (NVD)
EPSS score
1.89%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 15-07-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

1.89%

Chance of exploitation in the next 30 days

Percentile

79%

Versus all other CVEs

30-day change

0.00 pp

From 1.89% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.89%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Zscaler1 product

1 vendor · 1 product

References

1 links