CVE-2026-20282Cisco Identity Services Engine Authenticated Write Vulnerability
- 4.9MediumCVSS base score
- 0.60%Exploitation in 30 daysEPSS · top 51% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
A vulnerability in Cisco ISE could allow an authenticated, remote attacker to obtain write access on the underlying operating system of an affected device. 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 write access to the underlying operating system. To exploit this vulnerability, the attacker must have valid administrative credentials. Note: For CVE-2026-20282, Cisco has assigned a Security Impact Rating (SIR) of High rather than Medium as the score indicates. The reason is that it is easy to get to root from the achieved privilege level.
Timeline
ID reserved
By cisco
- 11 months later
· 11 months later
Published
- 6 days later
· 6 days 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 | Medium4.9 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N |
| NVDNVD · Awaiting Analysis | 3.1 | Medium4.9 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.60% · top 51% of all CVEs (13 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 4.9.
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
- affected 3.5.0
- affected 3.4 Patch 4
- affected 3.3 Patch 8
- affected 3.2 Patch 8
- affected 3.5 Patch 1
- affected 3.3 Patch 9
- affected 3.2 Patch 9
- affected 3.4 Patch 5
- affected 3.5 Patch 3
- and 9 more
What to do
Exploitation: The Cisco PSIRT is aware that a public announcement is available for the vulnerabilities that are described in this advisory. The Cisco PSIRT is not aware of any 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-2026-81140 (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-2026-20282)Record last updated .