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CVE-2025-7396— Curve25519 Blinding

Quick assessment

Affected
wolfSSL wolfSSL
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

wolfSSL（CyaSSL）是美国wolfSSL公司的一个针对嵌入式系统开发人员使用的小的、可移植的嵌入式SSL编程库。 wolfSSL 5.8.2版本存在安全漏洞，该漏洞源于默认启用Curve25519盲化支持，可能增加侧信道攻击风险。

EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2025-7396

Vulnerability Information
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Vulnerability Title
Curve25519 Blinding
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:P/AC:H/AT:P/PR:L/UI:A/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
wolfSSL 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
wolfSSL（CyaSSL）是美国wolfSSL公司的一个针对嵌入式系统开发人员使用的小的、可移植的嵌入式SSL编程库。 wolfSSL 5.8.2版本存在安全漏洞，该漏洞源于默认启用Curve25519盲化支持，可能增加侧信道攻击风险。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
wolfSSL wolfSSL 5.8.0; 0 -

II. Public POCs for CVE-2025-7396

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III. Intelligence Information for CVE-2025-7396

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Other References for CVE-2025-7396 (1)

Same Patch Batch · wolfSSL · 2025-07-18 · 3 CVEs total

CVE-2025-7394 OpenSSL 安全漏洞
CVE-2025-7395 Domain Name Validation Bypass with Apple Native Certificate Validation

IV. Related Vulnerabilities

Same product: wolfSSL
Same vendor: wolfSSL

V. Comments for CVE-2025-7396

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