Search/CVE-2025-66442
● CVE — Medium

CVE-2025-66442

VendorarmProductmbed tls, tf-psa-cryptoDiscoveredApr 1, 2026UpdatedApr 3, 2026

In Mbed TLS through 4.0.0, there is a compiler-induced timing side channel (in RSA and CBC/ECB decryption) that only occurs with LLVM's select-optimize feature. TF-PSA-Crypto through 1.0.0 is also affected.

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CVSS v3.1
5.1 MEDIUM
EPSS
0.28%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
0
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Aug 16, 2026 → Oct 30, 2026
● 0.01pp
0.27% → 0.28% over 2 tracked changes
CVSS v3.1 Detail
Attack VectorLOCAL
Attack ComplexityHIGH
Privileges RequiredNONE
User InteractionNONE
ScopeUNCHANGED
ConfidentialityHIGH
IntegrityNONE
AvailabilityNONE
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Connections
3 relationships
Timeline
disclosure → media coverage
Apr 1, 2026
Disclosure — published as a CVE record.