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CVE-2026-20178

MEDIUM
4.3
CVSS 3.1
Description
A vulnerability in the browser-based version of Cisco Webex App could have allowed an unauthenticated, remote attacker to redirect users to a malicious webpage. Cisco has addressed this vulnerability in the Cisco Webex App, and no customer action is needed. This vulnerability existed due to improper input validation of URL parameters in an HTTP request. Prior to this vulnerability being addressed, an attacker could have exploited this vulnerability by persuading a user to click a crafted URL. A successful exploit could have allowed the attacker to redirect a user to a malicious website.

Metadata

CVE ID
CVE-2026-20178
State
PUBLISHED
Assigner
cisco
Reserved
2025-10-08 11:59 UTC
Published
2026-06-17 16:28 UTC
Last updated
2026-06-17 18:13 UTC
Primary CWE
CWE-601
URL Redirection to Untrusted Site ('Open Redirect')
Vendor / Product
Cisco / Cisco Webex App
Sources
cve.org  ·  NVD

Severity & Metrics

4.3 MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
Cisco Cisco Webex App — N/A
Weakness (CWE)
CWESourceDescription
CWE-601 cna URL Redirection to Untrusted Site ('Open Redirect')
CVSS scores (1)
ScoreSeverityVersionSourceVector
4.3 MEDIUM 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
References (1)
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