CVE-2024-20396

A vulnerability in the protocol handlers of Cisco Webex App could allow an unauthenticated, remote attacker to gain access to sensitive information. This vulnerability exists because the affected application does not safely handle file protocol handlers. An attacker could exploit this vulnerability by persuading a user to follow a link that is designed to cause the application to send requests. If the attacker can observe transmitted traffic in a privileged network position, a successful exploit could allow the attacker to capture sensitive information, including credential information, from the requests.

Published: 2024-07-17 Last update: 2025-07-31 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-20396 is rated Moderate Risk (47.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.89%). Review affected assets and schedule remediation.

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-2024-20396

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 2025-12-06 0.66% 0.89% +0.23%
2 2025-11-21 0.33% 0.66% +0.32%
3 2025-11-18 — 0.33% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-20396

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N 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:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 1.6 3.6 [email protected]
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N 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:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 3.6 [email protected]

Weakness enumeration for CVE-2024-20396

Affected software / configurations for CVE-2024-20396

Vendor Product Version Raw CPE
cisco webex_teams 3.0.13464.0 cpe:2.3:a:cisco:webex_teams:3.0.13464.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.13538.0 cpe:2.3:a:cisco:webex_teams:3.0.13538.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.13588.0 cpe:2.3:a:cisco:webex_teams:3.0.13588.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.14154.0 cpe:2.3:a:cisco:webex_teams:3.0.14154.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.14234.0 cpe:2.3:a:cisco:webex_teams:3.0.14234.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.14375.0 cpe:2.3:a:cisco:webex_teams:3.0.14375.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.14741.0 cpe:2.3:a:cisco:webex_teams:3.0.14741.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.14866.0 cpe:2.3:a:cisco:webex_teams:3.0.14866.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.15015.0 cpe:2.3:a:cisco:webex_teams:3.0.15015.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.15036.0 cpe:2.3:a:cisco:webex_teams:3.0.15036.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.15092.0 cpe:2.3:a:cisco:webex_teams:3.0.15092.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.15131.0 cpe:2.3:a:cisco:webex_teams:3.0.15131.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.15164.0 cpe:2.3:a:cisco:webex_teams:3.0.15164.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.15221.0 cpe:2.3:a:cisco:webex_teams:3.0.15221.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.15333.0 cpe:2.3:a:cisco:webex_teams:3.0.15333.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.15410.0 cpe:2.3:a:cisco:webex_teams:3.0.15410.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.15485.0 cpe:2.3:a:cisco:webex_teams:3.0.15485.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.15645.0 cpe:2.3:a:cisco:webex_teams:3.0.15645.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.15711.0 cpe:2.3:a:cisco:webex_teams:3.0.15711.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.16040.0 cpe:2.3:a:cisco:webex_teams:3.0.16040.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.16269.0 cpe:2.3:a:cisco:webex_teams:3.0.16269.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.16273.0 cpe:2.3:a:cisco:webex_teams:3.0.16273.0:*:*:*:*:-:*:*
cisco webex_teams 3.0.16285.0 cpe:2.3:a:cisco:webex_teams:3.0.16285.0:*:*:*:*:-:*:*
cisco webex_teams 42.1.0.21190 cpe:2.3:a:cisco:webex_teams:42.1.0.21190:*:*:*:*:-:*:*
cisco webex_teams 42.2.0.21338 cpe:2.3:a:cisco:webex_teams:42.2.0.21338:*:*:*:*:-:*:*
cisco webex_teams 42.2.0.21486 cpe:2.3:a:cisco:webex_teams:42.2.0.21486:*:*:*:*:-:*:*
cisco webex_teams 42.3.0.21576 cpe:2.3:a:cisco:webex_teams:42.3.0.21576:*:*:*:*:-:*:*
cisco webex_teams 42.4.1.22032 cpe:2.3:a:cisco:webex_teams:42.4.1.22032:*:*:*:*:-:*:*
cisco webex_teams 42.5.0.22259 cpe:2.3:a:cisco:webex_teams:42.5.0.22259:*:*:*:*:-:*:*
cisco webex_teams 42.6.0.22565 cpe:2.3:a:cisco:webex_teams:42.6.0.22565:*:*:*:*:-:*:*
cisco webex_teams 42.6.0.22645 cpe:2.3:a:cisco:webex_teams:42.6.0.22645:*:*:*:*:-:*:*
cisco webex_teams 42.7.0.22904 cpe:2.3:a:cisco:webex_teams:42.7.0.22904:*:*:*:*:-:*:*
cisco webex_teams 42.7.0.23054 cpe:2.3:a:cisco:webex_teams:42.7.0.23054:*:*:*:*:-:*:*
cisco webex_teams 42.8.0.23214 cpe:2.3:a:cisco:webex_teams:42.8.0.23214:*:*:*:*:-:*:*
cisco webex_teams 42.8.0.23281 cpe:2.3:a:cisco:webex_teams:42.8.0.23281:*:*:*:*:-:*:*
cisco webex_teams 42.9.0.23494 cpe:2.3:a:cisco:webex_teams:42.9.0.23494:*:*:*:*:-:*:*
cisco webex_teams 42.10.0.23814 cpe:2.3:a:cisco:webex_teams:42.10.0.23814:*:*:*:*:-:*:*
cisco webex_teams 42.11.0.24187 cpe:2.3:a:cisco:webex_teams:42.11.0.24187:*:*:*:*:-:*:*
cisco webex_teams 42.12.0.24485 cpe:2.3:a:cisco:webex_teams:42.12.0.24485:*:*:*:*:-:*:*
cisco webex_teams 43.1.0.24716 cpe:2.3:a:cisco:webex_teams:43.1.0.24716:*:*:*:*:-:*:*
cisco webex_teams 43.2.0.25157 cpe:2.3:a:cisco:webex_teams:43.2.0.25157:*:*:*:*:-:*:*
cisco webex_teams 43.2.0.25211 cpe:2.3:a:cisco:webex_teams:43.2.0.25211:*:*:*:*:-:*:*
cisco webex_teams 43.3.0.25468 cpe:2.3:a:cisco:webex_teams:43.3.0.25468:*:*:*:*:-:*:*
cisco webex_teams 43.4.0.25788 cpe:2.3:a:cisco:webex_teams:43.4.0.25788:*:*:*:*:-:*:*

References for CVE-2024-20396

cvelogic Threat Intelligence