How severe is CVE-2026-25835?

CVE-2026-25835 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-25835 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25835?

CVE-2026-25835 primarily affects Arm Mbed Tls. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-25835?

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-2026-25835 have an EU (EUVD) identifier?

Yes. CVE-2026-25835 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17999.

When was CVE-2026-25835 published?

CVE-2026-25835 was published on 2026-04-01 and last updated on 2026-06-17.

CVE-2026-25835

CVE-2026-25835 is a high-severity vulnerability in Arm Mbed Tls with a CVSS 3.x base score of 7.7. 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-335.

Key facts

Severity: High (CVSS 3.x base score 7.7)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-17999
Weakness: CWE-335
Affected product: Arm Mbed Tls
Published: 2026-04-01
Last modified: 2026-06-17

Description

Mbed TLS before 3.6.6 and TF-PSA-Crypto before 1.1.0 misuse seeds in a Pseudo-Random Number Generator (PRNG).

Frequently asked questions

What is CVE-2026-25835?: Mbed TLS before 3.6.6 and TF-PSA-Crypto before 1.1.0 misuse seeds in a Pseudo-Random Number Generator (PRNG).
How severe is CVE-2026-25835?: CVE-2026-25835 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-25835 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25835?: CVE-2026-25835 primarily affects Arm Mbed Tls. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-25835?: 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-2026-25835 have an EU (EUVD) identifier?: Yes. CVE-2026-25835 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17999.
When was CVE-2026-25835 published?: CVE-2026-25835 was published on 2026-04-01 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*
cpe:2.3:a:trustedfirmware:mbed_tls:4.0.0:*:*:*:*:*:*:*
cpe:2.3:a:trustedfirmware:tf-psa-crypto:*:*:*:*:*:*:*:*

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