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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2023-28804

17
FAUCET Score

CVE-2023-28804 is an Improper Verification of Cryptographic Signature vulnerability affecting Zscaler Client Connector on Linux versions prior to 1.4.0.105, allowing an attacker to replace legitimate binaries. This vulnerability has a CVSS score of 5.3 (Medium), indicating a low attack complexity and network-based vector, but with a limited impact of only low integrity. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.4.0.105CPE matchmatch criteria
cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:linux:*:*
>= 0, < 1.4.0.105CPE match
cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:chrome_os:*:*

CVSS Data

CVSS version used by this source: 3.1

8.2HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.24%
Probability of exploitation in next 30 days
EPSS Percentile
15.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0024 is in the 6th percentile among its peer group of 23,725 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

help.zscaler.com / client-connector/client-connector-app-release-summary-2023
Release Notes