CVE-2026-15340
lwIP SMTP client does not check the size of inputs, potentially allowing a buffer overflow.
- Risk score
- 73/100
- CVSS
- 9.8 v3.1
- Exploit chance (30 days)
- 0.6%
- Published
- 9 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- lwIP SMTP client does not check the size of inputs, potentially allowing a buffer overflow.
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 9.8 critical
- Remotely exploitable without logging in
References
Original description
lwIP SMTP client does not check the size of inputs, potentially allowing a buffer overflow.
Last activity 9 Oct 2026. Patch Forecast updates every hour.