CVE-2026-15340— Savannah lwIP SMTP client Classic Buffer Overflow
Quick assessment
Affected
Savannah lwIP SMTP client
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
lwIP SMTP 客户端未检查输入的大小，可能导致缓冲区溢出。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 3
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Savannah | lwIP SMTP client | 2.2.1 |
affected |
patch_125_smtp_txbuf.diff |
unaffected | ||
git commit (614420f82c8729d070e01464c0dddb3c9525c772) |
unaffected |
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I. Basic Information for CVE-2026-15340
Vulnerability Information
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Vulnerability Title
Savannah lwIP SMTP client Classic Buffer Overflow
Source: CVE Program / CVE List V5
Vulnerability Description
lwIP SMTP client does not check the size of inputs, potentially allowing a buffer overflow.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Savannah | lwIP SMTP client | 2.2.1 | - |
|
II. Public POCs for CVE-2026-15340
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-15340 (2)
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V. Comments for CVE-2026-15340
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