CVE-2026-20186
Cisco Identity Services Engine Multiple Authenticated Remote Code Execution Vulnerability
- Published
- Updated
- Reserved
- Assigned by
- cisco
Description
A vulnerability in Cisco Identity Services Engine (ISE) could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. To exploit this vulnerability, the attacker must have at least Read Only Admin credentials. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges to root. In single-node ISE deployments, successful exploitation of these vulnerabilities could cause the affected ISE node to become unavailable, resulting in a denial of service (DoS) condition. In that condition, endpoints that have not already authenticated would be unable to access the network until the node is restored.
Timeline
ID reserved
By cisco
- 6 months later
· 6 months later
Published
- 1 day later
· 1 day later
Record updated
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 | Critical9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | Critical9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 5.6% · top 7.0% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.9.
Weakness
Affected products
Cisco · Cisco Identity Services Engine Software
- affected 3.1.0
- affected 3.1.0 p1
- affected 3.1.0 p3
- affected 3.1.0 p2
- affected 3.2.0
- affected 3.1.0 p4
- affected 3.1.0 p5
- affected 3.2.0 p1
- affected 3.1.0 p6
- affected 3.2.0 p2
- affected 3.1.0 p7
- affected 3.3.0
- affected 3.2.0 p3
- affected 3.2.0 p4
- affected 3.1.0 p8
- affected 3.2.0 p5
- affected 3.2.0 p6
- affected 3.1.0 p9
- affected 3.3 Patch 2
- affected 3.3 Patch 1
- affected 3.3 Patch 3
- affected 3.4.0
- affected 3.2.0 p7
- affected 3.3 Patch 4
- affected 3.4 Patch 1
- affected 3.1.0 p10
- affected 3.3 Patch 5
- affected 3.3 Patch 6
- affected 3.4 Patch 2
- affected 3.3 Patch 7
- affected 3.4 Patch 3
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 (1)
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)
- 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://trackcve.app/cve/CVE-2026-20186)Record last updated .