Is CVE-2026-49942 in the CISA KEV catalog?

No. CVE-2026-49942 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-49942?

CVE-2026-49942 has a CVSS v3 base score of 7.3 (HIGH).

What is the EPSS score for CVE-2026-49942?

CVE-2026-49942 has an EPSS score of 0.31% (23th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-49942?

Upgrade libnet-cidr-set-perl on debian unstable to 0.21-1 or later.

CVE & CISA-KEV Catalog

CVE-2026-49942

HIGH

7.3

CVSS v3

NVD

Description

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.

CWE-1289

How to fix

Remediation Available

libnet-cidr-set-perlDebian

Fixed in:0.21-1CVE-2026-49942

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityLow

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

Exploit Intelligence

0.31%probability of exploitation in 30 days

23rdpercentile

Low risk: more likely to be exploited than 23% of all known CVEs.

References

Third-Party Advisory2

Release Notes1

metacpan.org

Related Vulnerabilities

Other CWE-1289 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-45179	High	7.2	2.6%	-	-
CVE-2026-47729	Medium	6.5	1.9%	-	Fix
CVE-2026-48710	Medium	6.5	1.4%	-	Fix
CVE-2025-62718	Critical	9.9	1.2%	-	Fix
CVE-2026-33515	Medium	5.3	1.0%	-	Fix
CVE-2022-0675	Medium	5.6	0.9%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-08.