9.9

CVE-2026-20147: cisco cisco identity services engine software Command Injection

CVSS: 9.9v3.1CriticalAnalyzed
Published 15-04-2026Last modified 16-04-2026
Open JSON

Vulnerability summary

CVE-2026-20147 is a critical (CVSS 9.9) Command Injection vulnerability in cisco cisco identity services engine software. EPSS estimates a 10.38% chance of exploitation in the next 30 days, higher than 95.6% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.9/10
010
Critical · v3.1 (CVE.org)
EPSS score
10.38%
0%100%
Medium · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 15-04-2026
    PublishedVulnerability first disclosed.
  2. 16-04-2026
    Last modifiedVulnerability information updated.

Description

A vulnerability in Cisco ISE and Cisco ISE-PIC 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 valid administrative 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 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 metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

10.38%

Chance of exploitation in the next 30 days

Percentile

96%

Versus all other CVEs

30-day change

0.00 pp

From 10.38% on 19-09-2026

19-09-202619-10-2026
EPSS score
10.38%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cisco4 products
  • cisco identity services engine software3.1.0 | 3.1.0 p1 | 3.1.0 p3 | 3.1.0 p2 | 3.2.0 | 3.1.0 p4 | 3.1.0 p5 | 3.2.0 p1 | 3.1.0 p6 | 3.2.0 p2 | 3.1.0 p7 | 3.3.0 | 3.2.0 p3 | 3.2.0 p4 | 3.1.0 p8 | 3.2.0 p5 | 3.2.0 p6 | 3.1.0 p9 | 3.3 Patch 2 | 3.3 Patch 1 | 3.3 Patch 3 | 3.4.0 | 3.2.0 p7 | 3.3 Patch 4 | 3.4 Patch 1 | 3.1.0 p10 | 3.3 Patch 5 | 3.3 Patch 6 | 3.4 Patch 2 | 3.3 Patch 7 | 3.4 Patch 3 | 3.5.0 | 3.4 Patch 4 | 3.3 Patch 8 | 3.2 Patch 8 | 3.5 Patch 1 | 3.3 Patch 9 | 3.2 Patch 9 | 3.4 Patch 5 | 3.5 Patch 2
  • cisco ise passive identity connector3.2.0 | 3.1.0 | 3.3.0 | 3.4.0
  • identity_services_engine< 3.1.0 | 3.1.0 | 3.1.0:patch1 | 3.1.0:patch10 | 3.1.0:patch2 | 3.1.0:patch3 | 3.1.0:patch4 | 3.1.0:patch5 | 3.1.0:patch6 | 3.1.0:patch7 | 3.1.0:patch8 | 3.1.0:patch9 | 3.2.0 | 3.2.0:patch1 | 3.2.0:patch2 | 3.2.0:patch3 | 3.2.0:patch4 | 3.2.0:patch5 | 3.2.0:patch6 | 3.2.0:patch7 | 3.2.0:patch8 | 3.2.0:patch9 | 3.3.0 | 3.3.0:patch1 | 3.3.0:patch10 | 3.3.0:patch2 | 3.3.0:patch3 | 3.3.0:patch4 | 3.3.0:patch5 | 3.3.0:patch6 | 3.3.0:patch7 | 3.3.0:patch8 | 3.3.0:patch9 | 3.4.0 | 3.4.0:patch1 | 3.4.0:patch2 | 3.4.0:patch3 | 3.4.0:patch4 | 3.4.0:patch5 | 3.5.0 | 3.5.0:patch1 | 3.5.0:patch2
  • identity_services_engine_passive_identity_connector< 3.1.0 | 3.1.0 | 3.1.0:patch1 | 3.1.0:patch10 | 3.1.0:patch2 | 3.1.0:patch3 | 3.1.0:patch4 | 3.1.0:patch5 | 3.1.0:patch6 | 3.1.0:patch7 | 3.1.0:patch8 | 3.1.0:patch9 | 3.2.0 | 3.2.0:patch1 | 3.2.0:patch2 | 3.2.0:patch3 | 3.2.0:patch4 | 3.2.0:patch5 | 3.2.0:patch6 | 3.2.0:patch7 | 3.2.0:patch8 | 3.2.0:patch9 | 3.3.0 | 3.3.0:patch1 | 3.3.0:patch10 | 3.3.0:patch2 | 3.3.0:patch3 | 3.3.0:patch4 | 3.3.0:patch5 | 3.3.0:patch6 | 3.3.0:patch7 | 3.3.0:patch8 | 3.3.0:patch9 | 3.4.0 | 3.4.0:patch1 | 3.4.0:patch2 | 3.4.0:patch3 | 3.4.0:patch4 | 3.4.0:patch5

1 vendor · 4 products

References

1 links