How severe is CVE-2025-12889?

CVE-2025-12889 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-12889 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-12889?

CVE-2025-12889 affects Wolfssl. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-12889?

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

Does CVE-2025-12889 have an EU (EUVD) identifier?

Yes. CVE-2025-12889 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198520.

When was CVE-2025-12889 published?

CVE-2025-12889 was published on 2025-11-22 and last updated on 2026-06-17.

CVE-2025-12889

CVE-2025-12889 is a medium-severity vulnerability in Wolfssl with a CVSS 3.x base score of 5.4. 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-20.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v4: 2.3
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-198520
Weakness: CWE-20
Affected product: Wolfssl
Published: 2025-11-22
Last modified: 2026-06-17

Description

With TLS 1.2 connections a client can use any digest, specifically a weaker digest that is supported, rather than those in the CertificateRequest.

Frequently asked questions

What is CVE-2025-12889?: With TLS 1.2 connections a client can use any digest, specifically a weaker digest that is supported, rather than those in the CertificateRequest.
How severe is CVE-2025-12889?: CVE-2025-12889 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-12889 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-12889?: CVE-2025-12889 affects Wolfssl. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-12889?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-12889 have an EU (EUVD) identifier?: Yes. CVE-2025-12889 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198520.
When was CVE-2025-12889 published?: CVE-2025-12889 was published on 2025-11-22 and last updated on 2026-06-17.

References

https://github.com/wolfSSL/wolfssl/pull/9395

Affected products (1)

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

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