PatchTheCVECVE-2006-1173: Sendmail before 8.13.7 allows remote attackers to cause a denial of service via deeply nested, malformed multi
CVE-2006-1173 is a medium-severity flaw (CVSS 5.0) affecting sendmail. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Sendmail before 8.13.7 allows remote attackers to cause a denial of service via deeply nested, malformed multipart MIME messages that exhaust the stack during the recursive mime8to7 function for performing 8-bit to 7-bit conversion, which prevents Sendmail from delivering queued messages and might lead to disk consumption by core dump files.
Why this priority
- EPSS top 7%: very likely to be exploited
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.0 (Medium) |
| EPSS exploit chance | 5.3% (top 7%) |
| CISA exploited list | No |
| Weakness | CWE-399 |
| Published | 2006-06-07 |
| Last modified | 2026-06-16 |
Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2006-1173?
sendmail: upgrade to newer than 8.13.6. Exact commands for each OS are on this page.
Is CVE-2006-1173 being exploited?
CVE-2006-1173 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2006-1173 affect?
CVE-2006-1173 affects sendmail. Severity is medium (CVSS 5.0). Sendmail before 8.13.7 allows remote attackers to cause a denial of service via deeply nested, malformed multipart MIME messages that exhaust the stack during the recursive mime8to7 function for performing 8-bit to 7-bit conversion, which p
How urgent is CVE-2006-1173?
Priority 41/100. EPSS top 7%: very likely to be exploited
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