How severe is CVE-2025-40597?

CVE-2025-40597 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-40597 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 28% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-40597?

CVE-2025-40597 primarily affects Sonicwall Sma 500v 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-2025-40597?

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

Does CVE-2025-40597 have an EU (EUVD) identifier?

Yes. CVE-2025-40597 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22453.

When was CVE-2025-40597 published?

CVE-2025-40597 was published on 2025-07-23 and last updated on 2026-06-17.

CVE-2025-40597

CVE-2025-40597 is a high-severity vulnerability in Sonicwall Sma 500v Firmware with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 28% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-122.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 28% (98th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-22453
Weakness: CWE-122
Affected product: Sonicwall Sma 500v Firmware
Published: 2025-07-23
Last modified: 2026-06-17

Description

A Heap-based buffer overflow vulnerability in the SMA100 series web interface allows remote, unauthenticated attacker to cause Denial of Service (DoS) or potentially results in code execution.

Frequently asked questions

What is CVE-2025-40597?: A Heap-based buffer overflow vulnerability in the SMA100 series web interface allows remote, unauthenticated attacker to cause Denial of Service (DoS) or potentially results in code execution.
How severe is CVE-2025-40597?: CVE-2025-40597 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-40597 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 28% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-40597?: CVE-2025-40597 primarily affects Sonicwall Sma 500v 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-2025-40597?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-40597 have an EU (EUVD) identifier?: Yes. CVE-2025-40597 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22453.
When was CVE-2025-40597 published?: CVE-2025-40597 was published on 2025-07-23 and last updated on 2026-06-17.

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2025-0012

Affected products (3)

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

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