CVE-2025-20236 | Cisco Webex App Client-Side Remote Code Execution Vulnerability

A vulnerability in the custom URL parser of Cisco Webex App could allow an unauthenticated, remote attacker to persuade a user to download arbitrary files, which could allow the attacker to execute arbitrary commands on the host of the targeted user. This vulnerability is due to insufficient input validation when Cisco Webex App processes a meeting invite link. An attacker could exploit this vulnerability by persuading a user to click a crafted meeting invite link and download arbitrary files. A successful exploit could allow the attacker to execute arbitrary commands with the privileges of the targeted user.

Published: 2025-04-16 Last update: 2025-08-01 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-20236 is rated Moderate Risk (63.6/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.16%). 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-2025-20236

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 2026-05-25 0.36% 1.16% +0.80%
2 2026-02-10 0.10% 0.36% +0.25%
3 2025-11-21 — 0.10% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-20236

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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: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:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]

Weakness enumeration for CVE-2025-20236

Affected software / configurations for CVE-2025-20236

Vendor Product Version Raw CPE
cisco webex_teams 44.6 cpe:2.3:a:cisco:webex_teams:44.6:*:*:*:*:*:*:*
cisco webex_teams 44.6.0.29928 cpe:2.3:a:cisco:webex_teams:44.6.0.29928:*:*:*:*:*:*:*
cisco webex_teams 44.6.0.30148 cpe:2.3:a:cisco:webex_teams:44.6.0.30148:*:*:*:*:*:*:*
cisco webex_teams 44.7 cpe:2.3:a:cisco:webex_teams:44.7:*:*:*:*:*:*:*
cisco webex_teams 44.7.0.30141 cpe:2.3:a:cisco:webex_teams:44.7.0.30141:*:*:*:*:*:*:*
cisco webex_teams 44.7.0.30285 cpe:2.3:a:cisco:webex_teams:44.7.0.30285:*:*:*:*:*:*:*

References for CVE-2025-20236

cvelogic Threat Intelligence