CVE-2025-40596
HighA Stack-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.
Published Jul 23, 2025 · Updated Feb 26, 2026
Key Facts
Patch immediately- CVE-2025-40596 is a high-severity vulnerability (CVSS 7.3 v3.1) affecting Sma 210 Firmware (Sonicwall), Sma 410 Firmware (Sonicwall), Sma 500v Firmware (Sonicwall) and 1 more product.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 57% probability of exploitation in the next 30 days.
- Fixed versions are available, including Sma 210 Firmware 10.2.2.1-90sv, Sma 410 Firmware 10.2.2.1-90sv, Sma 500v Firmware 10.2.2.1-90sv.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
7.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS (30-day exploit likelihood)
57%
Higher than 99.0% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
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Description
A Stack-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.
Affected Products
4 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Sma 210 FirmwareSonicwall | See advisory | 10.2.2.1-90sv |
| Sma 410 FirmwareSonicwall | See advisory | 10.2.2.1-90sv |
| Sma 500v FirmwareSonicwall | See advisory | 10.2.2.1-90sv |
| SMA 100 Series | >= 10.2.1.15-81sv and earlier versions | n/a |
Patched Releases
Sma 210 Firmware
10.2.2.1-90sv
Sma 410 Firmware
10.2.2.1-90sv
Sma 500v Firmware
10.2.2.1-90sv
Timeline
Publicly disclosed
Jul 23, 2025
Last updated
Feb 26, 2026
Weakness Type
- CWE-121 Stack-based Buffer Overflow
References
FAQ
Common Questions.
A Stack-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.
Affected: Sma 210 Firmware (Sonicwall); Sma 410 Firmware (Sonicwall); Sma 500v Firmware (Sonicwall), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Sma 210 Firmware 10.2.2.1-90sv, Sma 410 Firmware 10.2.2.1-90sv, Sma 500v Firmware 10.2.2.1-90sv.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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