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CVE-2025-40600

SonicWall Sonicos vulnerability

9.8 CRITICALEPSS 0.91%
  1. Published29 Jul 2025

Description

Use of Externally-Controlled Format String vulnerability in the SonicOS SSL VPN interface allows a remote unauthenticated attacker to cause service disruption.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

SonicWall Sonicos≥ 7.1.1-7040 < 7.3.0-7012

Remediation

Fixed in
SonicWall Sonicos≥ 7.3.0-7012

References

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Frequently asked

Is CVE-2025-40600 being actively exploited?

CVE-2025-40600 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.91%.

How severe is CVE-2025-40600?

CVE-2025-40600 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.91% probability of exploitation.

Which products are affected by CVE-2025-40600?

Affected products include SonicWall Sonicos.

How do I fix CVE-2025-40600?

Upgrade affected software to a fixed version, for example SonicWall Sonicos 7.3.0-7012 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-40600 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.