CVE-2026-20178

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 59/100
Published: 2026-06-17 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: Required
S: Unchanged
C: None
I: Low
A: None

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
cisco webex_web_app -

Bug Bounty Relevance

59 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity

CVSS Score

4.3 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

EPSS — Exploitation Probability

0.20%
Raw Score 0.002020
Percentile 10.2%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00202
2026-10-28
0.00202

Intelligence Sources

nvd ref →