Cyber Resilience

CVE-2025-49463

Zoom ≤ 6.4.5

Published
10 July 2025
Modified
17 June 2026
Patch / advisory
View advisory
CVSS Score v3.1 6.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS Score 0.0041 34th percentile
Risk Priority 50 floored blend · peak EPSS

Summary

CVE-2025-49463 is a medium-severity Insufficient Control Flow Management (CWE-691) vulnerability in Zoom Zoom. Its CVSS base score is 6.5 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Hijack Execution Flow (T1574); ranked at the 34th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SC-2 (Separation of System and User Functionality) and SC-3 (Security Function Isolation) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

Insufficient control flow management in certain Zoom Clients for iOS before version 6.4.5 may allow an unauthenticated user to conduct a disclosure of information via network access.

CWE(s)
CWE-691

Related Threats

MITRE ATT&CK Enterprise Techniques

T1574 Hijack Execution Flow Stealth
Adversaries may execute their own malicious payloads by hijacking the way operating systems run programs.
attack.mitre.org →
T1055 Process Injection Stealth
Adversaries may inject code into processes in order to evade process-based defenses as well as possibly elevate privileges.
attack.mitre.org →
T1055.003 Thread Execution Hijacking Stealth
Adversaries may inject malicious code into hijacked processes in order to evade process-based defenses as well as possibly elevate privileges.
attack.mitre.org →
T1055.004 Asynchronous Procedure Call Stealth
Adversaries may inject malicious code into processes via the asynchronous procedure call (APC) queue in order to evade process-based defenses as well as possibly elevate privileges.
attack.mitre.org →
T1574.004 Dylib Hijacking Stealth
Adversaries may execute their own payloads by placing a malicious dynamic library (dylib) with an expected name in a path a victim application searches at runtime.
attack.mitre.org →
T1055.005 Thread Local Storage Stealth
Adversaries may inject malicious code into processes via thread local storage (TLS) callbacks in order to evade process-based defenses as well as possibly elevate privileges.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-36540Same product: Zoom Zoom
CVE-2023-22881Same product: Zoom Zoom
CVE-2023-22882Same product: Zoom Zoom
CVE-2023-28601Same product: Zoom Zoom
CVE-2023-28599Same product: Zoom Zoom
CVE-2023-28598Same product: Zoom Zoom
CVE-2025-49464Same product: Zoom Zoom
CVE-2025-49462Same product: Zoom Zoom
CVE-2023-28602Same product: Zoom Zoom
CVE-2023-34114Same product: Zoom Zoom

Affected Assets

zoom
zoom
≤ 6.4.5

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)
  • 2 hardening rules · 2 OS baselines
Validate
Prove the fix (OWASP ASVS)

—

Mitigating Controls (NIST 800-53 r5) AI

SC-2 Separation of System and User Functionality partial match

Separating user and system functionality structurally limits unexpected control-flow transfers between domains.

SC-3 Security Function Isolation partial match

Isolating security functions prevents control-flow tampering that would otherwise bypass or alter security decisions.

SC-39 Process Isolation partial match

Process isolation keeps execution domains separate so one process cannot hijack another's control flow.

SI-16 Memory Protection partial match

Memory protection blocks unauthorized code execution that would modify control flow at runtime.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC activities such as static analysis, code review, and testing directly prevent control-flow weaknesses while also addressing many other coding defects.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development and acceptance can detect control-flow weaknesses but does not itself implement preventive controls.

A.8.25 Secure development life cycle partial match
prevents

Secure development life cycle mandates structured control-flow design and review that directly reduces unexpected flow manipulation.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure system architecture and engineering principles require explicit control-flow integrity mechanisms and error-handling paths.

A.8.28 Secure coding partial match
prevents

Secure coding standards explicitly forbid constructs that allow unintended control-flow changes such as missing breaks or unsafe jumps.

A.8.32 Change management partial match
prevents

Change management reduces introduction of control-flow defects through controlled updates but does not address the weakness directly.

Hardening callouts derived

Configuration rules from DISA STIG baselines that bear on weaknesses of the type cited by this CVE. Each rule is shown with the relationship its mapping actually records, against the CWE it was authored against. Derived via CVE→CWE over `controls_xwalks` (authoritative rows only; rows rated `none` are excluded).

Windows 10 (1 rule)
  • V-220726 Data Execution Prevention (DEP) must be configured to at least OptOut. prevents CWE-691
Windows 11 (1 rule)
  • V-253283 Data Execution Prevention (DEP) must be configured to at least OptOut. prevents CWE-691

References