How severe is CVE-2025-40599?

CVE-2025-40599 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-40599 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-40599?

CVE-2025-40599 primarily affects Sonicwall Sma 210 Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-40599?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-40599 have an EU (EUVD) identifier?

Yes. CVE-2025-40599 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22450.

When was CVE-2025-40599 published?

CVE-2025-40599 was published on 2025-07-23 and last updated on 2026-06-17.

CVE-2025-40599

CVE-2025-40599 is a critical-severity vulnerability in Sonicwall Sma 210 Firmware with a CVSS 3.x base score of 9.1. Its EPSS exploit-prediction score of 12% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 12% (96th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-22450
Weakness: CWE-434
Affected product: Sonicwall Sma 210 Firmware
Published: 2025-07-23
Last modified: 2026-06-17

Description

An authenticated arbitrary file upload vulnerability exists in the SMA 100 series web management interface. A remote attacker with administrative privileges can exploit this flaw to upload arbitrary files to the system, potentially leading to remote code execution.

Frequently asked questions

What is CVE-2025-40599?: An authenticated arbitrary file upload vulnerability exists in the SMA 100 series web management interface. A remote attacker with administrative privileges can exploit this flaw to upload arbitrary files to the system, potentially leading to remote code execution.
How severe is CVE-2025-40599?: CVE-2025-40599 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-40599 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-40599?: CVE-2025-40599 primarily affects Sonicwall Sma 210 Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-40599?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-40599 have an EU (EUVD) identifier?: Yes. CVE-2025-40599 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22450.
When was CVE-2025-40599 published?: CVE-2025-40599 was published on 2025-07-23 and last updated on 2026-06-17.

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2025-0014

Affected products (3)

cpe:2.3:o:sonicwall:sma_210_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:sonicwall:sma_410_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:sonicwall:sma_500v_firmware:*:*:*:*:*:*:*:*

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