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CVE-2026-49942

31
FAUCET Score

Net::CIDR::Set versions through 0.20 for Perl did not validate network masks. The mask portion of a network mask could contain Unicode digits such as the Arabic-Indic One (U+0661), or non-digits, which were ignored. This could allow network masks to accept larger networks. Leading zeros were also accepted, but treated as decimal instead of octal. This could lead to confusion about what networks are acceptable.

First published: Jun 4, 2026Last modified: Jun 4, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 0, <= 0.20CPE match
cpe:2.3:a:rrwo:net\:\:cidr\:\:set:*:*:*:*:*:perl:*:*
< 0.21CPE matchmatch criteria
cpe:2.3:a:rrwo:net\:\:cidr\:\:set:*:*:*:*:*:perl:*:*

CVSS Data

CVSS version used by this source: 3.1

7.3HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.31%
Probability of exploitation in next 30 days
EPSS Percentile
23.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0031 is in the 6th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

metacpan.org / release/RRWO/Net-CIDR-Set-0.21/changes
Release Notes
nvd.nist.gov / vuln/detail/CVE-2025-40911
Third Party AdvisoryUS Government Resource
nvd.nist.gov / vuln/detail/CVE-2026-45191
Third Party AdvisoryUS Government Resource