# CVE-2026-20300: Cisco Identity Services Engine SQL injection vulnerability

Source: https://junglewise.ai/threats/cve-2026-20300-cisco-identity-services-engine-sql-injection-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-16. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-20300 · Severity: high · CVSS 7.1 · Published 2026-09-16

Cisco Identity Services Engine (ISE) is used to manage network identity and access policies. An authenticated attacker with administrative credentials can inject malicious SQL commands to read or modify the underlying database, potentially exposing or altering sensitive network access control and user identity data.

Technologies: [Cisco Identity Services Engine](https://junglewise.ai/threats/technologies/identity-services-engine). Vendors: [Cisco](https://junglewise.ai/threats/vendors/cisco).

## Quick answers

**Is CVE-2026-20300 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-20300 being exploited in the wild.

**How severe is CVE-2026-20300?** High severity, with a CVSS score of 7.1, published 16 September 2026.

**Which products and versions are affected?** Cisco Identity Services Engine 3.2 and earlier, 3.3 before Patch 12, 3.4 before Patch 7, 3.5 before Patch 4.

**Is there a fix for CVE-2026-20300?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-20300 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-20300?** Check whether you run Cisco Identity Services Engine at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This is a SQL injection vulnerability (CWE-89) in Cisco ISE caused by improper validation of user-supplied input. The vulnerability requires the attacker to have at least low-privileged administrative credentials and can be exploited via a crafted network request without user interaction. A successful exploit allows the attacker to read or modify data in the underlying database. Cisco has released patched software versions (3.3 Patch 12, 3.4 Patch 7, 3.5 Patch 4, and later releases) that address this vulnerability. The advisory indicates no workarounds are available.

## Affected products

- Cisco Identity Services Engine 3.2 and earlier, 3.3 before Patch 12, 3.4 before Patch 7, 3.5 before Patch 4

## Timeline

- 2026-09-16: disclosed

## References

- [https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-sql-inj-3QTKR947](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-sql-inj-3QTKR947)

## Related threats

- [Cisco Identity Services Engine authorization bypass in management interface](https://junglewise.ai/threats/cve-2026-20183-a-vulnerability-in-the-web-based-management-interface-of-cisco)
- [Cisco Identity Services Engine authorization bypass in certificate enrollment](https://junglewise.ai/threats/cve-2026-20241-a-vulnerability-in-the-authorization-mechanism-of-cisco-identity)
- [A vulnerability in an API of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to bypass authentication.](https://junglewise.ai/threats/cve-2026-76460-cisco-identity-services-engine-incorrect-privileged-api-use)
- [Cisco ISE SQL and HQL injection in APIs](https://junglewise.ai/threats/cve-2026-76451-cisco-ise-sql-and-hql-injection-in-apis)
- [Cisco Identity Services Engine SQL and HQL injection](https://junglewise.ai/threats/cve-2026-76450-cisco-identity-services-engine-sql-and-hql-injection)