CVE-2026-20109
Cisco Packaged Contact Center Enterprise and Cisco Unified Contact Center Enterprise Cross-Site Scripting Vulnerability
- 4.8MediumCVSS base score
- 0.21%Exploitation in 30 daysEPSS · top 89% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Multiple vulnerabilities in the web-based management interface of Cisco Packaged Contact Center Enterprise (Packaged CCE) and Cisco Unified Contact Center Enterprise (Unified CCE) could allow an authenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the web-based management interface of an affected device. These vulnerabilities exist because the web-based management interface does not properly validate user-supplied input. An attacker could exploit these vulnerabilities by injecting malicious code into specific pages of the interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information. To exploit these vulnerabilities, the attacker must have valid administrative credentials.
Timeline
ID reserved
By cisco
- 4 months later
· 4 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 | Medium4.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
| NVDNVD · Deferred | 3.1 | Medium4.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.21% · top 89% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.8.
Affected products
Cisco · Cisco Packaged Contact Center Enterprise
- affected 12.5(1)
- affected 11.0(1)
- affected 12.0(1)
- affected 11.0(2)
- affected 11.5(1)
- affected 10.5(1)
- affected 10.5(2)
- affected 11.6(2)
- affected 10.5(1)_ES7
- affected 11.6(1)
- affected 10.5(2)_ES8
- affected 12.6(1)
- affected 12.5(2)
- affected 12.6(2)
- affected 15.0(1)
Cisco · Cisco Unified Contact Center Enterprise
- affected 12.6(1)ES3
- affected 12.6(1)ES1
- affected 12.6(1)
- affected 12.6(1)ES2
- affected 12.6(1)SecurityPatch
- affected 12.5(1)ES1
- affected 12.5(1)
- affected 12.6(1)ES4
- affected 11.0(1)
- affected 10.5(1)
- affected 12.0(1)
- affected 10.5
- affected 11.0
- affected 11.5
- affected 12.6(2)
- affected 12.6(2)ES1
- affected 12.6(2)ES2
- affected 15.0(1)
- affected 12.6(2)ES3
- affected 15.0(1)ET01
- affected 15.0(1)_SP1
- affected 15.0(1)ES202508
- affected 12.6(2)_ES
What to do
Exploitation: The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are 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-2026-3651 (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-2026-20109)Record last updated .