CVE-2026-15340
Savannah lwIP SMTP client
- Savannah lwIP SMTP client
- Critical
- CVSS 9.3
- EPSS 0.37%
- Fixed version listed
What to do
Fixed version listed
Affected products
| Product | Affected | Fixed in |
|---|---|---|
| Savannah lwIP SMTP client | 2.2.1 | patch_125_smtp_txbuf.diff, git commit (614420f82c8729d070e01464c0dddb3c9525c772) |
Scores and signals
- Exploitation
- No known exploitation
- Severity
- Critical, CVSS 9.3 (v4.0, scored by icscert)
- EPSS
- 0.37% chance of exploitation in the next 30 days (EPSS from FIRST, as of Oct 25, 2026)
- CISA's SSVC decision points
- Exploitation: none. Automatable: yes. Technical impact: total. As of Oct 11, 2026.
- Weakness
- CWE-120: CWE-120
- Vendor
- Savannah, lwIP SMTP client
Timeline
- First listed as critical by cve.now. Affected and fixed versions come from the CVE record, once one is published.