Secuno
ENNL
Book demo

CVE-2026-20305

9.1 CRITICAL
  1. Published16 Sept 2026

Description

A vulnerability in the diagnostic tools of Cisco ISE and ISE-PIC could allow an authenticated, remote attacker to perform command injection attacks on the underlying operating system and elevate privileges to root. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending crafted commands to the web-based management interface of an affected device. A successful exploit could allow the attacker to execute arbitrary code on the device and elevate privileges to root. In single-node deployments, successful exploitation of this vulnerability 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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredHigh
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-923989.1
A vulnerability was found in Ruijie RG-EW3000GX EW_3.0(1)B11P380. Affected by this…
CVE-2026-203069.1
A vulnerability in the REST API of Cisco ISE and ISE-PIC could allow an authenticated,…
CVE-2026-923979.1
A vulnerability has been found in Ruijie RG-EW3000GX EW_3.0(1)B11P380. Affected by this…
CVE-2026-275659.8
An unauthenticated remote attacker can upload a malicious IODD file that places and…
CVE-2026-275598.8
A low-privileged remote attacker can exploit a command injection vulnerability in the…
CVE-2026-275588.8
A low-privileged remote attacker can exploit a command injection vulnerability in the…

Frequently asked

Is CVE-2026-20305 being actively exploited?

CVE-2026-20305 is not in the CISA KEV catalog.

How severe is CVE-2026-20305?

CVE-2026-20305 has a CVSS 3.1 base score of 9.1, rated critical.

How do I fix CVE-2026-20305?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-20305 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.