CVE-2025-27440Network attack vector

Authenticated privilege escalation via heap overflow

Published Mar 11, 2025 · Updated Mar 11, 2025

Heap overflow in Zoom Workplace Apps allows remote authenticated users to escalate privileges via network access on affected systems. Zoom has not disclosed the affected component, crafted input, or memory operation that causes the heap overflow. Exploitation requires an authenticated network session and can cross a security boundary to compromise confidentiality, integrity, and availability.

CVSS severity8.5
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Heap overflow in Zoom Workplace Apps allows remote authenticated users to escalate privileges via network access on affected systems. Zoom has not disclosed the affected component, crafted input, or memory operation that causes the heap overflow. Exploitation requires an authenticated network session and can cross a security boundary to compromise confidentiality, integrity, and availability.

The record

CVE
CVE-2025-27440
Published
Mar 11, 2025
Updated
Mar 11, 2025
Vendor
Zoom Video Communications, Inc.
Product
Zoom Workplace Apps
Classifications
CWE-124, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 11, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=See references.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zoom Video Communications, Inc. · Zoom Workplace Appsversion=See references.

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.5Zoom Video Communications, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-124Buffer Underwrite ('Buffer Underflow')
T1068Exploitation for Privilege Escalation

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo