How severe is CVE-2025-53696?

CVE-2025-53696 has a CVSS 4.0 base score of 9.3, rated critical severity.

Is CVE-2025-53696 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-53696?

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-2025-53696 have an EU (EUVD) identifier?

Yes. CVE-2025-53696 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22915.

When was CVE-2025-53696 published?

CVE-2025-53696 was published on 2025-07-28 and last updated on 2026-06-17.

CVE-2025-53696

CVE-2025-53696 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.3. 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-494.

Key facts

Severity: Critical (CVSS 4.0 base score 9.3)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-22915
Weakness: CWE-494
Published: 2025-07-28
Last modified: 2026-06-17

Description

iSTAR Ultra performs a firmware verification on boot, however the verification does not inspect certain portions of the firmware. These firmware parts may contain malicious code. Tested up to firmware 6.9.2, later firmwares are also possibly affected.

Frequently asked questions

What is CVE-2025-53696?: iSTAR Ultra performs a firmware verification on boot, however the verification does not inspect certain portions of the firmware. These firmware parts may contain malicious code. Tested up to firmware 6.9.2, later firmwares are also possibly affected.
How severe is CVE-2025-53696?: CVE-2025-53696 has a CVSS 4.0 base score of 9.3, rated critical severity.
Is CVE-2025-53696 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-53696?: 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-2025-53696 have an EU (EUVD) identifier?: Yes. CVE-2025-53696 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22915.
When was CVE-2025-53696 published?: CVE-2025-53696 was published on 2025-07-28 and last updated on 2026-06-17.

References

https://raw.githubusercontent.com/reidmefirst/vuln-disclosure/refs/heads/main/2025-03.txt

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