CVE-2025-40597Network attack vector

Unauthenticated service interruption via web heap overflow

Published Jul 23, 2025 · Updated Feb 26, 2026

Heap-based buffer overflow in SonicWall SMA 100 Series 10.2.1.15-81sv and earlier allows remote attackers to interrupt service. The web interface overruns a heap allocation while processing a crafted request, but SonicWall has not disclosed the affected endpoint, field, or routine. No authentication or user interaction is required; denial of service is established, while public evidence does not demonstrate code execution.

CVSS severity7.5
High
EPSS probability29.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in SonicWall SMA 100 Series 10.2.1.15-81sv and earlier allows remote attackers to interrupt service. The web interface overruns a heap allocation while processing a crafted request, but SonicWall has not disclosed the affected endpoint, field, or routine. No authentication or user interaction is required; denial of service is established, while public evidence does not demonstrate code execution.

The record

CVE
CVE-2025-40597
Published
Jul 23, 2025
Updated
Feb 26, 2026
Vendor
SonicWall
Product
Secure Mobile Access (SMA) 100 Series
Classifications
CWE-122, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 23, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.2.1.15-81sv and earlier versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SonicWall · Secure Mobile Access (SMA) 100 Seriesversion=10.2.1.15-81sv and earlier versions

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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