Dashboard / CVE-2025-66442

CVE-2025-66442

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 35/100
Published: 2026-04-01 Modified: 2026-11-04 First seen: 2026-11-04 Status: active

Attack Surface

No Auth No Interaction Conf. Impact

CVSS Vector Breakdown

AV: Local
AC: High
PR: None
UI: None
S: Unchanged
C: High
I: None
A: None

Description

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.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
arm mbed_tls < 4.0.0
arm tf-psa-crypto < 1.0.0

References & Advisories (4)

Bug Bounty Relevance

35 / 100
✓ No authentication
✓ No user interaction

CVSS Score

5.1 / 10.0 v3.1
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS — Exploitation Probability

0.28%
Raw Score 0.002800
Percentile 20.8%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00280
2026-11-12
0.00280
2026-11-10
0.00280
2026-11-09
0.00280
2026-11-08
0.00280
2026-11-07
0.00280
2026-11-06
0.00280
2026-11-05
0.00280
2026-11-04
0.00280

Intelligence Sources

nvd ref →

External Links