# CVE-2026-10512

## Summary

- **CVE ID:** CVE-2026-10512
- **Severity:** LOW
- **CVSS Score:** 2.3 (CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N)
- **CWE:** CWE-682
- **Published:** Jun 25, 2026
- **Last Modified:** Jun 26, 2026

## Description

The X25519 x86_64 assembly implementation fails to clear the most significant bit during the final modular reduction, so the computed result may not be fully reduced modulo the field prime 2^255 - 19. This can leave the field element in a non-canonical form, producing an incorrect result from the scalar multiplication and potentially a wrong shared secret. The final carry-propagation chains in the x64 and AVX2 reduction routines could overflow into the top bit, and the high limb was not masked afterward, so the 255-bit field element was left non-canonical.

## Affected Products

- wolfSSL — wolfSSL (5.6.4)

## References

- [CNA](https://github.com/wolfSSL/wolfssl/pull/10536)
- [CNA](https://www.wolfssl.com/docs/security-vulnerabilities/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.45%
- **EPSS Percentile:** 37.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._