How severe is CVE-2025-63221?

CVE-2025-63221 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2025-63221 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-63221?

CVE-2025-63221 affects Axeltechnology Puma Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-63221?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-63221 have an EU (EUVD) identifier?

Yes. CVE-2025-63221 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198210.

When was CVE-2025-63221 published?

CVE-2025-63221 was published on 2025-11-19 and last updated on 2026-06-17.

CVE-2025-63221

CVE-2025-63221 is a critical-severity vulnerability in Axeltechnology Puma Firmware with a CVSS 3.x base score of 9.1. 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-284.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-198210
Weakness: CWE-284
Affected product: Axeltechnology Puma Firmware
Published: 2025-11-19
Last modified: 2026-06-17

Description

The Axel Technology puma devices (firmware versions 0.8.5 to 1.0.3) are vulnerable to Broken Access Control due to missing authentication on the /cgi-bin/gstFcgi.fcgi endpoint. Unauthenticated remote attackers can list user accounts, create new administrative users, delete users, and modify system settings, leading to full compromise of the device.

Frequently asked questions

What is CVE-2025-63221?: The Axel Technology puma devices (firmware versions 0.8.5 to 1.0.3) are vulnerable to Broken Access Control due to missing authentication on the /cgi-bin/gstFcgi.fcgi endpoint. Unauthenticated remote attackers can list user accounts, create new administrative users, delete users, and modify system settings, leading to full compromise of the device.
How severe is CVE-2025-63221?: CVE-2025-63221 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2025-63221 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-63221?: CVE-2025-63221 affects Axeltechnology Puma Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-63221?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-63221 have an EU (EUVD) identifier?: Yes. CVE-2025-63221 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198210.
When was CVE-2025-63221 published?: CVE-2025-63221 was published on 2025-11-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:axeltechnology:puma_firmware:*:*:*:*:*:*:*:*

Other CWE-284 (Improper Access Control) vulnerabilities

CVE-2026-50746 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi…
CVE-2026-46978 — Critical (CVSS 10.0): Vulnerability in the Oracle Solaris product of Oracle Systems (component: Remote Administration Daemon). The…
CVE-2026-35308 — Critical (CVSS 10.0): Vulnerability in the Oracle Coherence product of Oracle Fusion Middleware (component: Centralized Third Party Jars).…
CVE-2026-35307 — Critical (CVSS 10.0): Vulnerability in the Oracle Coherence product of Oracle Fusion Middleware (component: Core). Supported versions that…
CVE-2026-46695 — Critical (CVSS 10.0): Boxlite is a sandbox service that allows users to create lightweight virtual machines (Boxes) and launch OCI containers…
CVE-2026-46840 — Critical (CVSS 10.0): Vulnerability in Oracle REST Data Services (component: Backend-as-a-Service). Supported versions that are affected are…

Browse all CWE-284 (Improper Access Control) vulnerabilities →