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Vulnerabilities

Vulnerability · CVE-2026-15340

Savannah lwIP SMTP client

Published Oct 6, 2026 · CISA

Check if you run it

No confirmed exploitation is on record for CVE-2026-15340. EPSS is 0.60%. Act only if a listed version of CISA is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.60%
Remediation
Not established
Affected products
CISA

View CSAF Summary Successful exploitation of this vulnerability could crash the device being accessed; a buffer overflow condition may allow remote code execution. The following versions of Savannah lwIP SMTP client are affected: lwIP SMTP client 2.2.1 (CVE-2026-15340) <th role="colum

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-15340

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-15340. EPSS is 0.60%. Act only if a listed version of CISA is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.60%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 6, 2026 · CISA Cybersecurity Advisories

    Detected

    View CSAF Summary Successful exploitation of this vulnerability could crash the device being accessed; a buffer overflow condition may allow remote code execution. The following versions of Savannah lwIP SMTP client are affected: lwIP SMTP client 2.2.1 (CVE-2026-15340) <th role="colum

Sources

  • CISA Cybersecurity AdvisoriesGovernment advisoryCVE-2026-15340

    View CSAF Summary Successful exploitation of this vulnerability could crash the device being accessed; a buffer overflow condition may allow remote code execution. The following versions of Savannah lwIP SMTP client are affected: lwIP SMTP client 2.2.1 (CVE-2026-15340) <th role="

    cisa.gov
  • CISA ICS AdvisoriesGovernment advisoryCVE-2026-15340

    View CSAF Summary Successful exploitation of this vulnerability could crash the device being accessed; a buffer overflow condition may allow remote code execution. The following versions of Savannah lwIP SMTP client are affected: lwIP SMTP client 2.2.1 (CVE-2026-15340) <th role="

    cisa.gov
  • CVE.orgVulnerability recordCVE-2026-15340

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-15340

    30-day exploitation probability 0.6%

    first.org

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.