CVE-2023-36532Network attack vector

Service interruption via undisclosed buffer overflow

Published Aug 8, 2023 · Updated Oct 9, 2024

Buffer overflow in Zoom Clients before 5.14.5 allows remote attackers to interrupt client availability through network access. Zoom has not published the affected component, the network input that overflows the buffer, or the faulty bounds operation. No authentication or user interaction is required, and the documented consequence is limited to loss of client availability, with no reported data access or alteration.

CVSS severity5.9
Medium
EPSS probability1.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Zoom Clients before 5.14.5 allows remote attackers to interrupt client availability through network access. Zoom has not published the affected component, the network input that overflows the buffer, or the faulty bounds operation. No authentication or user interaction is required, and the documented consequence is limited to loss of client availability, with no reported data access or alteration.

The record

CVE
CVE-2023-36532
Published
Aug 8, 2023
Updated
Oct 9, 2024
Vendor
Zoom Video Communications, Inc.
Product
Zoom Clients
Classifications
CWE-122, CAPEC-100, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=before 5.14.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Zoom Video Communications, Inc. · Zoom Clientsversion=before 5.14.5

Published CVSS scores

5.9Zoom Video Communications, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CAPEC-100Overflow Buffers
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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