How severe is CVE-2026-49940?

CVE-2026-49940 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-49940 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-49940?

CVE-2026-49940 affects Rrwo Net. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-49940?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-49940 have an EU (EUVD) identifier?

Yes. CVE-2026-49940 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34297.

When was CVE-2026-49940 published?

CVE-2026-49940 was published on 2026-06-04 and last updated on 2026-06-17.

CVE-2026-49940

CVE-2026-49940 is a medium-severity vulnerability in Rrwo Net with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1289.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-34297
Weakness: CWE-1289
Affected product: Rrwo Net
Published: 2026-06-04
Last modified: 2026-06-17

Description

Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks. Unicode digits such as the Arabic-Indic One (U+0661) were accepted but not properly parsed as numbers. This could allow network masks to accept larger networks.

Frequently asked questions

What is CVE-2026-49940?: Net::CIDR::Set versions through 0.20 for Perl accept non-ASCII IP addresses and netmasks. Unicode digits such as the Arabic-Indic One (U+0661) were accepted but not properly parsed as numbers. This could allow network masks to accept larger networks.
How severe is CVE-2026-49940?: CVE-2026-49940 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-49940 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-49940?: CVE-2026-49940 affects Rrwo Net. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-49940?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-49940 have an EU (EUVD) identifier?: Yes. CVE-2026-49940 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-34297.
When was CVE-2026-49940 published?: CVE-2026-49940 was published on 2026-06-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:rrwo:net\:\:cidr\:\:set:*:*:*:*:*:perl:*:*

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