{"identifier":"CVE-2025-8556","cve":{"id":"CVE-2025-8556","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.","published":"2025-08-06T09:15:28.173000+00:00","modified":"2026-10-27T06:17:22.587000+00:00","status":"Deferred","score":3.7,"severity":"LOW","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","cvss_version":"3.1","affected":[],"weaknesses":["CWE-1287"],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2025-8556","source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2371624","source":"secalert@redhat.com"},{"url":"https://github.com/cloudflare/circl","source":"secalert@redhat.com"},{"url":"https://github.com/cloudflare/circl/security/advisories/GHSA-2x5j-vhc8-9cwm","source":"secalert@redhat.com"},{"url":"https://github.com/cloudflare/circl/tree/v1.6.1","source":"secalert@redhat.com"},{"url":"https://news.ycombinator.com/item?id=45669593","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.botanica.software/blog/cryptographic-issues-in-cloudflares-circl-fourq-implementation","source":"af854a3a-2127-422b-91ae-364da2661108"}],"kev":null,"kev_checked":true,"metrics":{"cvssMetricV31":[{"source":"secalert@redhat.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","baseScore":3.7,"baseSeverity":"LOW","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":2.2,"impactScore":1.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2025-08-06T20:24:48.827225Z","id":"CVE-2025-8556","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[],"source":"nvd","retrieved_at":"2026-10-28T10:18:11.387705+00:00","exploited":false,"kev_stale":false,"products":[],"priority":{"label":"Assess exposure and vendor guidance","reasons":["No higher-priority signal is available in the current stored evidence."]},"epss":{"probability":0.00531,"percentile":0.44824,"date":"2026-10-29","stale":false},"version_assessment":null},"news":[],"campaigns":[],"domains":[{"domain":"access.redhat.com","source_url":"https://access.redhat.com/security/cve/CVE-2025-8556","investigate_url":"https://investigate.aeglixmind.com/#access.redhat.com"},{"domain":"bugzilla.redhat.com","source_url":"https://bugzilla.redhat.com/show_bug.cgi?id=2371624","investigate_url":"https://investigate.aeglixmind.com/#bugzilla.redhat.com"},{"domain":"github.com","source_url":"https://github.com/cloudflare/circl","investigate_url":"https://investigate.aeglixmind.com/#github.com"},{"domain":"news.ycombinator.com","source_url":"https://news.ycombinator.com/item?id=45669593","investigate_url":"https://investigate.aeglixmind.com/#news.ycombinator.com"},{"domain":"www.botanica.software","source_url":"https://www.botanica.software/blog/cryptographic-issues-in-cloudflares-circl-fourq-implementation","investigate_url":"https://investigate.aeglixmind.com/#www.botanica.software"}],"arsenal_url":"https://arsenal.aeglixmind.com/?cve=CVE-2025-8556","catalog_url":"https://cves.aeglixmind.com/cve/CVE-2025-8556","research_url":"https://investigate.aeglixmind.com/research/cve/CVE-2025-8556","coverage":{"news_candidates_checked":0,"campaign_candidates_checked":0,"bounded":false,"notice":"Exact CVE mentions in stored public excerpts and reviewed campaign content only. A mention is not proof of exploitation, attribution or tool suitability. Missing matches do not establish absence."}}