How severe is CVE-2025-11935?

CVE-2025-11935 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-11935 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-11935?

CVE-2025-11935 affects Wolfssl. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-11935?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-11935 have an EU (EUVD) identifier?

Yes. CVE-2025-11935 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198529.

When was CVE-2025-11935 published?

CVE-2025-11935 was published on 2025-11-21 and last updated on 2026-06-17.

CVE-2025-11935

CVE-2025-11935 is a high-severity vulnerability in Wolfssl with a CVSS 3.x base score of 7.5. 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-326.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 6.3
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-198529
Weakness: CWE-326
Affected product: Wolfssl
Published: 2025-11-21
Last modified: 2026-06-17

Description

With TLS 1.3 pre-shared key (PSK) a malicious or faulty server could ignore the request for PFS (perfect forward secrecy) and the client would continue on with the connection using PSK without PFS. This happened when a server responded to a ClientHello containing psk_dhe_ke without a key_share extension. The re-use of an authenticated PSK connection that on the clients side unexpectedly did not have PFS, reduces the security of the connection.

Frequently asked questions

What is CVE-2025-11935?: With TLS 1.3 pre-shared key (PSK) a malicious or faulty server could ignore the request for PFS (perfect forward secrecy) and the client would continue on with the connection using PSK without PFS. This happened when a server responded to a ClientHello containing psk_dhe_ke without a key_share extension. The re-use of an authenticated PSK connection that on the clients side unexpectedly did not have PFS, reduces the security of the connection.
How severe is CVE-2025-11935?: CVE-2025-11935 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-11935 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-11935?: CVE-2025-11935 affects Wolfssl. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-11935?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-11935 have an EU (EUVD) identifier?: Yes. CVE-2025-11935 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198529.
When was CVE-2025-11935 published?: CVE-2025-11935 was published on 2025-11-21 and last updated on 2026-06-17.

References

Affected products (1)

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

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