Is CVE-2026-25835 in the CISA KEV catalog?

No. CVE-2026-25835 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-25835?

CVE-2026-25835 has a CVSS v3 base score of 7.7 (Important).

What is the EPSS score for CVE-2026-25835?

CVE-2026-25835 has an EPSS score of 0.17% (7th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-25835?

Upgrade mbedtls on debian unstable to 3.6.6-0.1 or later.

CVE & CISA-KEV Catalog

CVE-2026-25835

HIGH

7.7

CVSS v3

NVD

Description

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

CWE-335

How to fix

Remediation Available

mbedtlsDebian

Fixed in:3.6.6-0.1CVE-2026-25835

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U

Exploit Intelligence

0.17%probability of exploitation in 30 days

7thpercentile

Low risk: more likely to be exploited than 7% of all known CVEs.

References

Vendor Advisory2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-05.