How severe is CVE-2026-3579?

CVE-2026-3579 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-3579 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3579?

CVE-2026-3579 affects Wolfssl. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3579?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-3579 have an EU (EUVD) identifier?

Yes. CVE-2026-3579 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13170.

When was CVE-2026-3579 published?

CVE-2026-3579 was published on 2026-03-19 and last updated on 2026-06-17.

CVE-2026-3579

CVE-2026-3579 is a medium-severity vulnerability in Wolfssl with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-203.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v4: 2.1
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-13170
Weakness: CWE-203
Affected product: Wolfssl
Published: 2026-03-19
Last modified: 2026-06-17

Description

wolfSSL 5.8.4 on RISC-V RV32I architectures lacks a constant-time software implementation for 64-bit multiplication. The compiler-inserted __muldi3 subroutine executes in variable time based on operand values. This affects multiple SP math functions (sp_256_mul_9, sp_256_sqr_9, etc.), leading to a timing side-channel that may expose sensitive cryptographic data.

Frequently asked questions

What is CVE-2026-3579?: wolfSSL 5.8.4 on RISC-V RV32I architectures lacks a constant-time software implementation for 64-bit multiplication. The compiler-inserted __muldi3 subroutine executes in variable time based on operand values. This affects multiple SP math functions (sp_256_mul_9, sp_256_sqr_9, etc.), leading to a timing side-channel that may expose sensitive cryptographic data.
How severe is CVE-2026-3579?: CVE-2026-3579 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-3579 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3579?: CVE-2026-3579 affects Wolfssl. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3579?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-3579 have an EU (EUVD) identifier?: Yes. CVE-2026-3579 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13170.
When was CVE-2026-3579 published?: CVE-2026-3579 was published on 2026-03-19 and last updated on 2026-06-17.

References

https://github.com/wolfSSL/wolfssl/pull/9855

Affected products (1)

cpe:2.3:a:wolfssl:wolfssl:5.8.4:*:*:*:*:*:*:*

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