CVE-2026-34873

CRITICAL
INFO Priority: 0.02 BB Relevance: 78/100
Published: 2026-04-01 Modified: 2026-11-11 First seen: 2026-11-11 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

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

Description

An issue was discovered in Mbed TLS 3.5.0 through 4.0.0. Client impersonation can occur while resuming a TLS 1.3 session.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
trustedfirmware mbed_tls 3.5.0 – 3.6.6

Bug Bounty Relevance

78 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

9.1 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS — Exploitation Probability

0.25%
Raw Score 0.002510
Percentile 16.6%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00251
2026-11-12
0.00251
2026-11-10
0.00251

Intelligence Sources

nvd ref →