{"action":"Upgrade apache2 to 2.4.66-1~deb12u1 or later.","affected":[{"fixed":"2.4.66-1~deb12u1","introduced":"0"}],"component":"apache2","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["2.4.66-1~deb12u1"],"id":"tcs_01M5NP2F2VS5SFDWKSM1V6TDEG","modified_at":"2026-10-23T17:47:41.714762560Z","published_at":"2025-12-05T11:15:51.890Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2025-55753","https://security-tracker.debian.org/tracker/CVE-2025-55753"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2025-55753","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2025-55753"}],"summary":"An integer overflow in the case of failed ACME certificate renewal leads, after a number of failures (~30 days in default configurations), to the backoff timer becoming 0. Attempts to renew the certif"}