CVE-2025-20139A vulnerability in chat messaging features of Cisco Enterprise Chat and Email (ECE) could allow an unauthenticated, remote attacker to…
- 7.5HighCVSS base score
- 0.67%Exploitation in 30 daysEPSS · top 48% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
A vulnerability in chat messaging features of Cisco Enterprise Chat and Email (ECE) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. This vulnerability is due to improper validation of user-supplied input to chat entry points. An attacker could exploit this vulnerability by sending malicious requests to a messaging chat entry point in the affected application. A successful exploit could allow the attacker to cause the application to stop responding, resulting in a DoS condition. The application may not recover on its own and may need an administrator to manually restart services to recover.
Timeline
ID reserved
By cisco
- 6 months later
· 6 months later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| ciscoCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Analyzed | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.67% · top 48% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
Cisco · Cisco Enterprise Chat and Email
- affected 11.5(1)
- affected 11.6(1)
- affected 11.6(1)_ES2
- affected 11.6(1)_ES3
- affected 11.6(1)_ES4
- affected 11.6(1)_ES5
- affected 11.6(1)_ES6
- affected 11.6(1)_ES10
- affected 11.6(1)_ES11
- affected 11.6(1)_ES7
- affected 11.6(1)_ES8
- affected 11.6(1)_ES9
- affected 11.6(1)_ES9a
- affected 11.6(1)_ES12
- affected 11.6(1)_ES12_ET1
- affected 12.0(1)
- affected 12.0(1)_ES1
- affected 12.0(1)_ES2
- affected 12.0(1)_ES3
- affected 12.0(1)_ES4
- affected 12.0(1)_ES5
- affected 12.0(1)_ES5a
- affected 12.0(1)_ES6
- affected 12.0(1)_ES6_ET1
- affected 12.0(1)_ES6_ET2
- affected 12.0(1)_ES6_ET3
- affected 12.0(1)_ES7
- affected 12.0(1)_ES7_ET1
- affected 12.5(1)
- affected 12.5(1)_ES1
- affected 12.5(1)_ES2
- affected 12.5(1)_ES3
- affected 12.5(1)_ES3_ET1
- affected 12.5(1)_ET1
- affected 12.5(1)_ES4
- affected 12.5(1)_ES3_ET2
- affected 12.5(1)_ES4_ET1
- affected 12.5(1)_ES5
- affected 12.5(1)_ES5_ET1
- affected 12.5(1)_ES6
- and 46 more
What to do
Exploitation: The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
References
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-9561 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-20139)Record last updated .