{"cve":{"cve_id":"CVE-2019-16905","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.02228,"epss_percentile":0.8241,"epss_as_of":"2026-10-15","description":"OpenSSH 7.7 through 7.9 and 8.x before 8.1, when compiled with an experimental key type, has a pre-authentication integer overflow if a client or server is configured to use a crafted XMSS key. This leads to memory corruption and local code execution because of an error in the XMSS key parsing algorithm. NOTE: the XMSS implementation is considered experimental in all released OpenSSH versions, and there is no supported way to enable it when building portable OpenSSH.","published_at":"2019-10-09T00:00:00Z","last_modified_at":"2026-10-14T07:16:48.583000Z","cvss_v3_score":7.8,"cvss_v3_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-190"],"nvd_references":["https://www.openssh.com/releasenotes.html","https://www.openwall.com/lists/oss-security/2019/10/09/1","https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/sshkey-xmss.c.diff?r1=1.5&r2=1.6&f=h","https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/sshkey-xmss.c","https://bugzilla.suse.com/show_bug.cgi?id=1153537","https://ssd-disclosure.com/archives/4033/ssd-advisory-openssh-pre-auth-xmss-integer-overflow","https://security.netapp.com/advisory/ntap-20191024-0003/","https://security.gentoo.org/glsa/201911-01","https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"],"vuln_status":"Modified","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-10-15T05:09:53.750310Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"L","value_label":"Local"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"L","value_label":"Low"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"netapp","vendor_name":"NetApp","product_slug":"cloud-backup","product_name":"cloud_backup","version_start":null,"version_start_inclusive":null,"version_end":null,"version_end_inclusive":null,"cpe23_uri":"cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*"},{"vendor_slug":"netapp","vendor_name":"NetApp","product_slug":"steelstore-cloud-integrated-storage","product_name":"steelstore_cloud_integrated_storage","version_start":null,"version_start_inclusive":null,"version_end":null,"version_end_inclusive":null,"cpe23_uri":"cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:*:*:*:*:*:*:*"},{"vendor_slug":"openbsd","vendor_name":"OpenBSD","product_slug":"openssh","product_name":"OpenSSH","version_start":"7.7","version_start_inclusive":true,"version_end":"7.9","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"scalance-x204rna-ecc-firmware","product_name":"scalance_x204rna_ecc_firmware","version_start":null,"version_start_inclusive":null,"version_end":"3.2.7","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:o:siemens:scalance_x204rna_ecc_firmware:*:*:*:*:*:*:*:*"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"scalance-x204rna-firmware","product_name":"scalance_x204rna_firmware","version_start":null,"version_start_inclusive":null,"version_end":"3.2.7","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:o:siemens:scalance_x204rna_firmware:*:*:*:*:*:*:*:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://www.openssh.com/releasenotes.html","source_type":"MISC","tags":[]},{"url":"https://www.openwall.com/lists/oss-security/2019/10/09/1","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/sshkey-xmss.c.diff?r1=1.5&r2=1.6&f=h","source_type":"MISC","tags":[]},{"url":"https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/sshkey-xmss.c","source_type":"MISC","tags":[]},{"url":"https://bugzilla.suse.com/show_bug.cgi?id=1153537","source_type":"MISC","tags":[]},{"url":"https://ssd-disclosure.com/archives/4033/ssd-advisory-openssh-pre-auth-xmss-integer-overflow","source_type":"MISC","tags":[]},{"url":"https://security.netapp.com/advisory/ntap-20191024-0003/","source_type":"MISC","tags":[]},{"url":"https://security.gentoo.org/glsa/201911-01","source_type":"MISC","tags":[]},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2019-10-09T00:00:00Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-10-14T23:59:09.254433Z","label":"CVSS score revised","source":"nvd"},{"type":"cvss_changed","at":"2026-10-14T23:59:09.254433Z","label":"CVSS score revised","source":"nvd"},{"type":"cvss_changed","at":"2026-10-14T23:59:09.254433Z","label":"CVSS score revised","source":"nvd"}]}