// For flags

CVE-2025-7396

Curve25519 Blinding

Severity Score

5.6
*CVSS v4

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

In wolfSSL release 5.8.2 blinding support is turned on by default for Curve25519 in applicable builds. The blinding configure option is only for the base C implementation of Curve25519. It is not needed, or available with; ARM assembly builds, Intel assembly builds, and the small Curve25519 feature. While the side-channel attack on extracting a private key would be very difficult to execute in practice, enabling blinding provides an additional layer of protection for devices that may be more susceptible to physical access or side-channel observation.

*Credits: Arnaud Varillon, Laurent Sauvage, Allan Delautre
CVSS Scores
Attack Vector
Physical
Attack Complexity
High
Attack Requirements
Present
Privileges Required
Low
User Interaction
Active
System
Vulnerable | Subsequent
Confidentiality
High
High
Integrity
None
None
Availability
None
None
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2025-07-09 CVE Reserved
  • 2025-07-18 CVE Published
  • 2025-07-21 CVE Updated
  • 2025-08-19 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-385: Covert Timing Channel
CAPEC
  • CAPEC-622: Electromagnetic Side-Channel Attack
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Wolfssl
Search vendor "Wolfssl"
 Wolfssl
Search vendor "Wolfssl" for product "Wolfssl"
*-
Affected