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CVE-2026-20283

MEDIUM(6.5)

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Risk Signal Score26/100 — MITTEL
  • CVSS 6.5 — Mittel
  • Weniger als 24 Stunden alt

Erwähnungen (letzte 60 Tage)

Artikel

Beschreibung

A vulnerability in the IPsec Open API endpoint of Cisco ISE could allow an authenticated, remote attacker to inject arbitrary commands on the underlying operating system.  This vulnerability is due to insufficient validation of user-supplied input in IPsec Open API calls. An attacker could exploit this vulnerability by sending crafted input to the IPsec Open API endpoint on an affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system.  To exploit this vulnerability, the attacker must have valid administrative credentials and the node must have more than one network interface, one of which must be configured as an active IPsec tunnel. Note: For CVE-2026-20283, 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.

Erkennung & Indikatoren

Ausnutzung

In den geprüften Quellen nicht genannt

Threat-Hunting-Queries

Detects attempts to execute arbitrary commands via the IPsec Open API endpoint. Requires logging of API calls and command execution on the underlying OS.

Sentinel/Defender KQL

DeviceProcessEvents
| where InitiatingProcessCommandLine contains "IPsec Open API" and ProcessCommandLine matches regex "(sh|bash|powershell|cmd)"

Splunk SPL

index=cisco_ise sourcetype=ise_logs "IPsec Open API" | rex field=_raw "(?<command>(sh|bash|powershell|cmd).*)" | where isnotnull(command)

Sigma

title: Cisco ISE IPsec API Command Injection
logsource:
  product: cisco_ise
  service: ise_logs
detection:
  selection:
    message|contains: "IPsec Open API"
    message|re: "(sh|bash|powershell|cmd)"
  condition: selection
level: high

Elastic ES|QL

from cisco_ise_logs
| where message : "IPsec Open API" and message : /(sh|bash|powershell|cmd).*/

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Referenzen