How severe is CVE-2025-54764?

CVE-2025-54764 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-54764 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-54764?

CVE-2025-54764 affects Arm Mbed Tls. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-54764?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-54764 have an EU (EUVD) identifier?

Yes. CVE-2025-54764 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-35113.

When was CVE-2025-54764 published?

CVE-2025-54764 was published on 2025-10-20 and last updated on 2026-06-17.

CVE-2025-54764

CVE-2025-54764 is a medium-severity vulnerability in Arm Mbed Tls with a CVSS 3.x base score of 6.2. 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-208.

Key facts

Severity: Medium (CVSS 3.x base score 6.2)
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-35113
Weakness: CWE-208
Affected product: Arm Mbed Tls
Published: 2025-10-20
Last modified: 2026-06-17

Description

Mbed TLS before 3.6.5 allows a local timing attack against certain RSA operations, and direct calls to mbedtls_mpi_mod_inv or mbedtls_mpi_gcd.

Frequently asked questions

What is CVE-2025-54764?: Mbed TLS before 3.6.5 allows a local timing attack against certain RSA operations, and direct calls to mbedtls_mpi_mod_inv or mbedtls_mpi_gcd.
How severe is CVE-2025-54764?: CVE-2025-54764 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-54764 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-54764?: CVE-2025-54764 affects Arm Mbed Tls. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-54764?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-54764 have an EU (EUVD) identifier?: Yes. CVE-2025-54764 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-35113.
When was CVE-2025-54764 published?: CVE-2025-54764 was published on 2025-10-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*

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