CVE-2026-4948· NVD / CVE Program· CNA redhat

Firewalld: firewalld: local unprivileged user can modify firewall state due to d-bus setter mis-authorization

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.

MediumCVSS 5.5 · v3.1—No exploit Fix available

Local privilege escalation

Published: Mar 27, 2026
Updated: Sep 16, 2026
EPSS: 0.2% · 7th percentile
CWE: CWE-279

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Action score

Monitor

Low priority for now.

CVSS: 22 / 40 · 5.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.2%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · redhat: 5.5; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

Vendor	Product	CPE
firewalld	firewalld	cpe:2.3:a:firewalld:firewalld
redhat	enterprise linux	cpe:2.3:o:redhat:enterprise_linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

firewalld firewalldup to 2.4.0 inclusive
redhat enterprise linux7.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

Red Hat Red Hat Enterprise Linux 10
- 0:2.4.2-1.el10_2 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
- 0:2.3.1-1.el10_0.1 and laternot affected · rpm
Red Hat Red Hat Enterprise Linux 7
- all versionsaffected
Red Hat Red Hat Enterprise Linux 8
- all versionsaffected
Red Hat Red Hat Enterprise Linux 9
- 0:1.3.4-20.el9_8 and laternot affected · rpm
- 0:1.3.4-20.el9_8 and laternot affected · rpm
Red Hat Red Hat OpenShift Container Platform 4
- all versionsaffected
- all versionsunknown

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
AlmaLinux:9	firewall-applet	before 1.3.4-20.el9_8	1.3.4-20.el9_8
AlmaLinux:9	firewall-config	before 1.3.4-20.el9_8	1.3.4-20.el9_8
AlmaLinux:9	firewalld	before 1.3.4-20.el9_8	1.3.4-20.el9_8
AlmaLinux:9	firewalld-filesystem	before 1.3.4-20.el9_8	1.3.4-20.el9_8
AlmaLinux:9	python3-firewall	before 1.3.4-20.el9_8	1.3.4-20.el9_8
Debian:12	firewalld	before 1.3.3-1~deb12u2	1.3.3-1~deb12u2
Debian:13	firewalld	before 2.3.1-1+deb13u1	2.3.1-1+deb13u1
Debian:14	firewalld	before 2.4.0-2	2.4.0-2
openSUSE:Leap 16.0	firewalld	before 2.1.2-160000.3.1	2.1.2-160000.3.1
openSUSE:Tumbleweed	firewalld	before 2.3.2-2.1	2.3.2-2.1
Red Hat:enterprise_linux_eus:10.0	firewall-applet	before 0:2.3.1-1.el10_0.1	0:2.3.1-1.el10_0.1
Red Hat:enterprise_linux_eus:10.0	firewall-config	before 0:2.3.1-1.el10_0.1	0:2.3.1-1.el10_0.1
Red Hat:enterprise_linux_eus:10.0	firewalld	before 0:2.3.1-1.el10_0.1	0:2.3.1-1.el10_0.1
Red Hat:enterprise_linux_eus:10.0	firewalld-filesystem	before 0:2.3.1-1.el10_0.1	0:2.3.1-1.el10_0.1
Red Hat:enterprise_linux_eus:10.0	python3-firewall	before 0:2.3.1-1.el10_0.1	0:2.3.1-1.el10_0.1
Red Hat:enterprise_linux:10.2	firewall-applet	before 0:2.4.2-1.el10_2	0:2.4.2-1.el10_2
Red Hat:enterprise_linux:10.2	firewall-config	before 0:2.4.2-1.el10_2	0:2.4.2-1.el10_2
Red Hat:enterprise_linux:10.2	firewalld	before 0:2.4.2-1.el10_2	0:2.4.2-1.el10_2
Red Hat:enterprise_linux:10.2	firewalld-filesystem	before 0:2.4.2-1.el10_2	0:2.4.2-1.el10_2
Red Hat:enterprise_linux:10.2	python3-firewall	before 0:2.4.2-1.el10_2	0:2.4.2-1.el10_2
Red Hat:enterprise_linux:9::appstream	firewall-applet	before 0:1.3.4-20.el9_8	0:1.3.4-20.el9_8
Red Hat:enterprise_linux:9::appstream	firewall-config	before 0:1.3.4-20.el9_8	0:1.3.4-20.el9_8
Red Hat:enterprise_linux:9::baseos	firewalld	before 0:1.3.4-20.el9_8	0:1.3.4-20.el9_8
Red Hat:enterprise_linux:9::baseos	firewalld-filesystem	before 0:1.3.4-20.el9_8	0:1.3.4-20.el9_8

Same product

firewalld: all records

Other highest-scoring records for the same primary product.

CVE-2016-5410firewalld.py in firewalld before 0.4.3.3 allows local users to bypass authentication and modify firewall configurations via the (1) addPasst
22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
almalinux:firewall-applet	1.3.4-20.el9_8 · AlmaLinux:9	Package registry (OSV)
almalinux:firewall-config	1.3.4-20.el9_8 · AlmaLinux:9	Package registry (OSV)
almalinux:firewalld	1.3.4-20.el9_8 · AlmaLinux:9	Package registry (OSV)
almalinux:firewalld-filesystem	1.3.4-20.el9_8 · AlmaLinux:9	Package registry (OSV)
almalinux:python3-firewall	1.3.4-20.el9_8 · AlmaLinux:9	Package registry (OSV)
debian:firewalld	1.3.3-1~deb12u2 · Debian:12	Package registry (OSV)
opensuse:firewalld	2.3.2-2.1 · openSUSE:Tumbleweed	Package registry (OSV)
red hat:firewall-applet	0:2.4.2-1.el10_2 · Red Hat:enterprise_linux:10.2	Package registry (OSV)
red hat:firewall-config	0:2.4.2-1.el10_2 · Red Hat:enterprise_linux:10.2	Package registry (OSV)
red hat:firewalld	0:2.4.2-1.el10_2 · Red Hat:enterprise_linux:10.2	Package registry (OSV)
red hat:firewalld-filesystem	0:2.4.2-1.el10_2 · Red Hat:enterprise_linux:10.2	Package registry (OSV)
red hat:python3-firewall	0:2.4.2-1.el10_2 · Red Hat:enterprise_linux:10.2	Package registry (OSV)
rocky linux:firewalld	0:1.3.4-20.el9_8 · Rocky Linux:9	Package registry (OSV)
suse:firewalld	2.0.0-slfo.1.1_2.1 · SUSE:Linux Micro 6.1	Package registry (OSV)
suse:rpcbind	1.2.9-1.1 · SUSE:Linux Micro 6.0	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Asim Viladi Oglu Manizada

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Someone with local access to the system can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: high · data or configuration can be modified
Availability: none

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: High
Availability impact: None

Weakness class (CWE)

CWE-279 · Incorrect Execution-Assigned Permissions

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

Web Server Logs TamperingCAPEC-81likelihood: Medium · High

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

Fix✗ → ✓Sep 28, 2026, 10:45 PM UTC

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records