Is CVE-2026-4948 in the CISA KEV catalog?

No. CVE-2026-4948 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-4948?

CVE-2026-4948 has a CVSS v3 base score of 5.5 (Moderate).

What is the EPSS score for CVE-2026-4948?

CVE-2026-4948 has an EPSS score of 0.12% (2th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-4948?

Upgrade firewalld on debian 11 to 0.9.3-2+deb11u1 or later.

CVE & CISA-KEV Catalog

CVE-2026-4948

MEDIUM

5.5

CVSS v3

NVD

Description

A flaw was found in firewalld. A local unprivileged user can exploit this vulnerability by mis-authorizing two runtime D-Bus (Desktop Bus) setters, setZoneSettings2 and setPolicySettings. This mis-authorization allows the user to modify the runtime firewall state without proper authentication, leading to unauthorized changes in network security configurations.

CWE-279

How to fix

Remediation Available

firewalldDebian

Fixed in:0.9.3-2+deb11u1CVE-2026-4948

Fixed in:2.3.1-1+deb13u1CVE-2026-4948

Fixed in:2.4.0-2CVE-2026-4948

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 VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.12%probability of exploitation in 30 days

2ndpercentile

Low risk: more likely to be exploited than 2% of all known CVEs.

References

Vendor Advisory2

Other references1

lists.debian.org

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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 2026-05-15.