CVE-2025-20139 is a denial-of-service (DoS) vulnerability affecting Cisco Enterprise Chat and Email (ECE) products, specifically within its chat messaging features. An unauthenticated, remote attacker can exploit this by sending crafted requests due to improper input validation, causing the application to become unresponsive and require manual restart. Rated as HIGH severity (CVSS 7.5), this vulnerability has a low attack complexity and no user interaction is required. There is currently no public exploit code available, it is not listed in CISA KEV, and community discussion and media coverage are minimal.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 12.6\(1\)es10CPE matchmatch criteria | cpe:2.3:a:cisco:enterprise_chat_and_email:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.