CVE-2020-15309

7.0 highEPSS 0.3%

High (7.0) in wolfssl wolfssl. EPSS 0.3% chance of exploitation in the next 30 days.

An issue was discovered in wolfSSL before 4.5.0, when single precision is not employed. Local attackers can conduct a cache-timing attack against public key operations. These attackers may already have obtained sensitive information if the affected system has been used for private key operations (e.g., signing with a private key).

Severity

CVSS 3.1

7.0 high

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 27% of CVEs (scores of 2026-10-31)
CWE: CWE-362
Published: 2020-08-21
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

wolfssl:wolfssl

References

https://arxiv.org/abs/2008.12188
https://github.com/wolfSSL/wolfssl/releases/tag/v4.5.0-stable
https://arxiv.org/abs/2008.12188
https://github.com/wolfSSL/wolfssl/releases/tag/v4.5.0-stable

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