{"cve":"CVE-2025-40911","nvd":{"published":"2025-05-27T22:15:22.337","modified":"2026-06-17T09:22:16.670","status":"Deferred","description":"Net::CIDR::Set versions 0.10 through 0.13 for Perl does not properly handle leading zero characters in IP CIDR address strings, which could allow attackers to bypass access control that is based on IP addresses.\n\nLeading zeros are used to indicate octal numbers, which can confuse users who are intentionally using octal notation, as well as users who believe they are using decimal notation.\n\nNet::CIDR::Set used code from Net::CIDR::Lite, which had a similar vulnerability CVE-2021-47154.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","score":6.5},"cwes":["CWE-1287"],"references":["https://blog.urth.org/2021/03/29/security-issues-in-perl-ip-address-distros/","https://github.com/robrwo/perl-Net-CIDR-Set/commit/be7d91e8446ad8013b08b4be313d666dab003a8a.patch","https://metacpan.org/release/RRWO/Net-CIDR-Set-0.14/changes"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:01:57.636215869+00:00"},"epss":{"cve":"CVE-2025-40911","score":0.00379,"percentile":0.3189,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}