CVE-2026-0204: A vulnerability in the access control mechanism of SonicOS may allow certain management interface functions to

Q: How do I fix CVE-2026-0204?

sonicos: upgrade to 6.5.5.2-28n, 7.3.2-7010, 8.2.0-8009. Exact commands for each OS are on this page.

Q: Is CVE-2026-0204 being exploited?

CVE-2026-0204 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-0204 affect?

CVE-2026-0204 affects sonicos. Severity is high (CVSS 8.0). A vulnerability in the access control mechanism of SonicOS may allow certain management interface functions to be accessible under specific conditions.

Routine

HIGH 8.0UPGRADE

CVE-2026-0204 is a high-severity flaw (CVSS 8.0) affecting sonicos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in the access control mechanism of SonicOS may allow certain management interface functions to be accessible under specific conditions.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.0 (High)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 68%)
CISA exploited list	No
Weakness	CWE-306, CWE-1390
Published	2026-04-29
Last modified	2026-10-26

Publisher (CNA): SonicWALL, Inc. · Vendor: sonicwall

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-29 17:16 UTCPublished CVE record published
2026-10-26 20:10 UTCUpdated Record last modified

sonicwall sonicos UPGRADE

Affected: < 6.5.5.2-28n · >= 7.0.0.0 and <= 7.0.1-5169 · >= 7.1.1-7040 and < 7.3.2-7010 · >= 8.0.0-8035 and < 8.2.0-8009

Fixed in: 6.5.5.2-28n, 7.3.2-7010, 8.2.0-8009

Safe to downgrade to: a release before 7.0.0.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-0204?

sonicos: upgrade to 6.5.5.2-28n, 7.3.2-7010, 8.2.0-8009. Exact commands for each OS are on this page.

Is CVE-2026-0204 being exploited?

CVE-2026-0204 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-0204 affect?

CVE-2026-0204 affects sonicos. Severity is high (CVSS 8.0). A vulnerability in the access control mechanism of SonicOS may allow certain management interface functions to be accessible under specific conditions.

How urgent is CVE-2026-0204?

Priority 36/100. High severity

Software pages

SonicWall vulnerabilities

Related CVEs

CVE-2026-0205 MEDIUM 6.8 UPGRADE A post-authentication Path Traversal vulnerability in SonicOS allows an attacker to interact with usually rest
CVE-2026-0206 MEDIUM 4.9 UPGRADE A post-authentication Stack-based Buffer Overflow vulnerabilities in SonicOS allows a remote attacker to crash

References

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