CVE-2026-15340: Savannah lwIP SMTP client Classic Buffer Overflow
Published Oct 9, 2026
·Updated
lwIP SMTP client does not check the size of inputs, potentially allowing a buffer overflow.
Affected Software
1 affected component
lwIP SMTP client
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Savannah lwIP SMTP clientto a version that resolves this vulnerability.Patch patch_125_smtp_txbuf.diff
Event History
Oct 9, 2026
CVE Published
via MITRE·02:52 PM
Data Sourced
via MITRE·02:52 PM
RemedyDescriptionSeverityWeakness
Frequently Asked Questions
1
What does an attacker need to exploit this issue?
The vulnerability is remotely reachable over the network and is rated low complexity. It requires no privileges and no user interaction.
2
What could a successful exploit affect?
The reported impact is high for confidentiality, integrity, and availability.