How severe is CVE-2025-8556?

CVE-2025-8556 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-8556 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-8556?

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

Does CVE-2025-8556 have an EU (EUVD) identifier?

Yes. CVE-2025-8556 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23815.

When was CVE-2025-8556 published?

CVE-2025-8556 was published on 2025-08-06 and last updated on 2026-06-17.

CVE-2025-8556

CVE-2025-8556 is a low-severity vulnerability with a CVSS 3.x base score of 3.7. 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-1287.

Key facts

Severity: Low (CVSS 3.x base score 3.7)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-23815
Weakness: CWE-1287
Published: 2025-08-06
Last modified: 2026-06-17

Description

A flaw was found in CIRCL's implementation of the FourQ elliptic curve. This vulnerability allows an attacker to compromise session security via low-order point injection and incorrect point validation during Diffie-Hellman key exchange.

Frequently asked questions

What is CVE-2025-8556?: A flaw was found in CIRCL's implementation of the FourQ elliptic curve. This vulnerability allows an attacker to compromise session security via low-order point injection and incorrect point validation during Diffie-Hellman key exchange.
How severe is CVE-2025-8556?: CVE-2025-8556 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-8556 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-8556?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-8556 have an EU (EUVD) identifier?: Yes. CVE-2025-8556 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-23815.
When was CVE-2025-8556 published?: CVE-2025-8556 was published on 2025-08-06 and last updated on 2026-06-17.

References

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