Savannah lwIP SMTP client

Summary

Vulnerabilities 1

• Critical 9.8
  CVE-2026-15340

  Savannah lwIP SMTP client Classic Buffer Overflow

  lwIP SMTP client does not check the size of inputs, potentially allowing a buffer overflow.

  Savannah lwIP SMTP client lwip Debian
  Oct 9, 2026

Revision history

1. 2026-10-06 #1

   Initial Publication

References

• ICSA Advisory ICSA-26-279-02 - Web Version
  https://www.cisa.gov/news-events/ics-advisories/icsa-26-279-02
• Recommended Practices
  https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
• Recommended Practices
  https://www.cisa.gov/resources-tools/resources/ics-recommended-practices
• Recommended Practices
  https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf
• Recommended Practices
  https://www.cisa.gov/topics/industrial-control-systems
• Recommended Practices
  https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01
• Recommended Practices
  https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
• Recommended Practices
  https://www.cisa.gov/news-events/news/targeted-cyber-intrusion-detection-and-mitigation-strategies-update-b
• Recommended Practices
  https://www.cisa.gov/secure-our-world/teach-employees-avoid-phishing
• Recommended Practices
  https://www.cisa.gov/news-events/news/avoiding-social-engineering-and-phishing-attacks