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CVE-2023-28602

23
FAUCET Score

CVE-2023-28602 is an improper cryptographic signature verification vulnerability affecting Zoom for Windows clients prior to version 5.13.5, allowing a malicious authenticated user to downgrade Zoom Client components. With a CVSS score of 7.7 (High), this network-exploitable flaw has high integrity impact, enabling attackers to potentially revert software to less secure versions. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 5.13.5CPE matchmatch criteria
cpe:2.3:a:zoom:zoom:*:*:*:*:*:windows:*:*

CVSS Data

CVSS version used by this source: 3.1

2.8LOW

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

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
1.1
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.31%
Probability of exploitation in next 30 days
EPSS Percentile
23.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0031 is in the 11th percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

explore.zoom.us / en/trust/security/security-bulletin
Vendor Advisory