CVE-2023-49646

Improper authentication in some Zoom clients before version 5.16.5 may allow an authenticated user to conduct a denial of service via network access.

Published: 2023-12-13 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-49646 is rated Low Risk (37.1/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.40%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-49646

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.02% 0.40% +0.38%
2 2025-11-21 0.09% 0.02% -0.07%
3 2025-11-18 — 0.09% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-49646

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.4 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.1 2.7 [email protected]
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]

Weakness enumeration for CVE-2023-49646

Affected software / configurations for CVE-2023-49646

Vendor Product Version Raw CPE
zoom meeting_software_development_kit < 5.16.5 cpe:2.3:a:zoom:meeting_software_development_kit:*:*:*:*:*:*:*:*
zoom video_software_development_kit < 5.16.5 cpe:2.3:a:zoom:video_software_development_kit:*:*:*:*:*:*:*:*
zoom virtual_desktop_infrastructure < 5.14.14 cpe:2.3:a:zoom:virtual_desktop_infrastructure:*:*:*:*:*:*:*:*
zoom virtual_desktop_infrastructure >= 5.15.0, < 5.15.12 cpe:2.3:a:zoom:virtual_desktop_infrastructure:*:*:*:*:*:*:*:*
zoom zoom < 5.16.5 cpe:2.3:a:zoom:zoom:*:*:*:*:*:android:*:*
zoom zoom < 5.16.5 cpe:2.3:a:zoom:zoom:*:*:*:*:*:iphone_os:*:*
zoom zoom < 5.16.5 cpe:2.3:a:zoom:zoom:*:*:*:*:*:linux:*:*
zoom zoom < 5.16.5 cpe:2.3:a:zoom:zoom:*:*:*:*:*:macos:*:*
zoom zoom < 5.16.5 cpe:2.3:a:zoom:zoom:*:*:*:*:*:windows:*:*

References for CVE-2023-49646

cvelogic Threat Intelligence