Vulnerability in Rrwo Net::cidr::set
CVE-2025-40911
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. Leading 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. Net::CIDR::Set used code from Net::CIDR::Lite, which had a similar vulnerability CVE-2021-47154.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (28.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 28.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Rrwo Net::cidr::set — versions 0.10
Weakness classification (CWE)
Public proof-of-concept exploits
References
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (release-notes)
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (patch)
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (related)
Frequently asked questions
- What is CVE-2025-40911?
- CVE-2025-40911 is a medium-severity vulnerability in Rrwo Net::cidr::set, classified under CWE-1287. CVSS score: 6.5/10. Published 2025-05-27.
- How severe is CVE-2025-40911?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2025-40911 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.