{"id":"CVE-2025-2516","aliases":["EUVD-2025-8443","GHSA-cvv7-5999-m892"],"status":"published","title":"Use of a weak cryptographic key in the signature verification process in WPS Office","description":"The use of a weak cryptographic key pair in the signature verification process in WPS Office (Kingsoft) on Windows allows an attacker who successfully recovered the private key to sign components.\n\nAs older versions of WPS Office did not validate the update server's certificate, an Adversary-In-The-Middle attack was possible allowing updates to be hijacked.","severity":{"version":"4.0","score":9.5,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/U:Amber","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00141,"percentile":0.03459,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-326"],"published":"2025-03-27T14:29:22Z","modified":"2026-06-17T09:07:05Z","products":[{"vendor":"kingsoft","product":"wps office"},{"vendor":"wps","product":"wps office"}],"references":[{"url":"https://www.welivesecurity.com/en/eset-research/nspx30-sophisticated-aitm-enabled-implant-evolving-since-2005/"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-2516"},{"url":"https://www.welivesecurity.com/en/eset-research/nspx30-sophisticated-aitm-enabled-implant-evolving-since-2005"},{"url":"https://github.com/advisories/GHSA-cvv7-5999-m892"}],"sources":{"cve":[{"id":"CVE-2025-2516","title":"Use of a weak cryptographic key in the signature verification process in WPS Office","description":"The use of a weak cryptographic key pair in the signature verification process in WPS Office (Kingsoft) on Windows allows an attacker who successfully recovered the private key to sign components.\n\nAs older versions of WPS Office did not validate the update server's certificate, an Adversary-In-The-Middle attack was possible allowing updates to be hijacked.","status":"published","published":"2025-03-27T14:29:22.907Z","modified":"2025-03-27T15:15:56.127Z","cvss":[{"version":"4.0","score":9.5,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/U:Amber","level":"critical","assessor":"cna"}],"cwes":["CWE-326"],"updated_at":"2026-11-02T14:32:38.70481Z"}],"euvd":[{"id":"EUVD-2025-8443","description":"The use of a weak cryptographic key pair in the signature verification process in WPS Office (Kingsoft) on Windows allows an attacker who successfully recovered the private key to sign components.\n\nAs older versions of WPS Office did not validate the update server's certificate, an Adversary-In-The-Middle attack was possible allowing updates to be hijacked.","status":"published","published":"2025-03-27T14:29:22Z","modified":"2025-03-27T15:15:56Z","cvss":[{"version":"4.0","score":9.5,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/U:Amber","level":"critical"}],"updated_at":"2026-11-02T20:52:49.499517Z"}],"ghsa":[{"id":"GHSA-cvv7-5999-m892","title":"The use of a weak cryptographic key pair in the signature verification process in WPS Office ...","description":"The use of a weak cryptographic key pair in the signature verification process in WPS Office (Kingsoft) on Windows allows an attacker who successfully recovered the private key to sign components.\n\nAs older versions of WPS Office did not validate the update server's certificate, an Adversary-In-The-Middle attack was possible allowing updates to be hijacked.","status":"published","published":"2025-03-27T15:31:14Z","modified":"2025-03-27T15:31:22Z","cvss":[{"version":"4.0","score":9.5,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Amber","level":"critical"}],"cwes":["CWE-326"],"updated_at":"2026-11-02T15:00:29.248113Z"}],"nvd":[{"id":"CVE-2025-2516","description":"The use of a weak cryptographic key pair in the signature verification process in WPS Office (Kingsoft) on Windows allows an attacker who successfully recovered the private key to sign components.\n\nAs older versions of WPS Office did not validate the update server's certificate, an Adversary-In-The-Middle attack was possible allowing updates to be hijacked.","status":"published","published":"2025-03-27T15:16:01.28Z","modified":"2026-06-17T09:07:05.833Z","cvss":[{"version":"4.0","score":9.5,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Amber","level":"critical","assessor":"secondary"}],"cwes":["CWE-326"],"updated_at":"2026-11-02T14:10:56.494516Z"}]}}