CVE-2025-20152
CVE-2025-20152 is a high-severity vulnerability in Cisco Identity Services Engine with a CVSS 3.x base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.
Key facts
- Severity: High (CVSS 3.x base score 8.6)
- EPSS exploit prediction: 1% (47th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-16022
- Weakness: CWE-125
- Affected product: Cisco Identity Services Engine
- Published:
- Last modified:
Description
A vulnerability in the RADIUS message processing feature of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of certain RADIUS requests. An attacker could exploit this vulnerability by sending a specific authentication request to a network access device (NAD) that uses Cisco ISE for authentication, authorization, and accounting (AAA). A successful exploit could allow the attacker to cause Cisco ISE to reload.
Frequently asked questions
- What is CVE-2025-20152?
- A vulnerability in the RADIUS message processing feature of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of certain RADIUS requests. An attacker could exploit this vulnerability by sending a specific authentication request to a network access device (NAD) that uses Cisco ISE for authentication, authorization, and accounting (AAA). A successful exploit could allow the attacker to cause Cisco ISE to reload.
- How severe is CVE-2025-20152?
- CVE-2025-20152 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2025-20152 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-20152?
- CVE-2025-20152 affects Cisco Identity Services Engine. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2025-20152?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-20152 have an EU (EUVD) identifier?
- Yes. CVE-2025-20152 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-16022.
- When was CVE-2025-20152 published?
- CVE-2025-20152 was published on 2025-05-21 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:cisco:identity_services_engine:3.4.0:*:*:*:*:*:*:*
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