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.
Conclusion & alert: CVE-2006-1173 is rated Moderate Risk (46.9/100): CVSS Medium severity, with high exploitation likelihood (EPSS 5.08%, 91th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 21.46% | 5.08% | -16.38% |
| 2 | 2025-12-28 | 25.25% | 21.46% | -3.79% |
| 3 | 2025-12-27 | — | 25.25% | — |
Full EPSS history (16 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
low | CVE-2006-1173 low priority: Debian including 1 source packages (sendmail), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2006-1173 |
gentoo
|
normal | CVE-2006-1173: 1 GLSA(s) (200606-19), 1 atom(s) (mail-mta/sendmail); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2006-1173 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2006-1173 |
ubuntu
|
medium | CVE-2006-1173 medium priority: Ubuntu including 1 source packages (sendmail), 5 status rows across 5 suites (dapper, edgy, feisty, gutsy, upstream): released 4, needs-triage 1. | https://ubuntu.com/security/CVE-2006-1173 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| sendmail | sendmail | <= 8.13.6 | cpe:2.3:a:sendmail:sendmail:*:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.8.8 | cpe:2.3:a:sendmail:sendmail:8.8.8:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.9.0 | cpe:2.3:a:sendmail:sendmail:8.9.0:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.9.1 | cpe:2.3:a:sendmail:sendmail:8.9.1:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.9.2 | cpe:2.3:a:sendmail:sendmail:8.9.2:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.9.3 | cpe:2.3:a:sendmail:sendmail:8.9.3:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.10 | cpe:2.3:a:sendmail:sendmail:8.10:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.10.1 | cpe:2.3:a:sendmail:sendmail:8.10.1:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.10.2 | cpe:2.3:a:sendmail:sendmail:8.10.2:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.11.0 | cpe:2.3:a:sendmail:sendmail:8.11.0:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.11.1 | cpe:2.3:a:sendmail:sendmail:8.11.1:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.11.2 | cpe:2.3:a:sendmail:sendmail:8.11.2:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.11.3 | cpe:2.3:a:sendmail:sendmail:8.11.3:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.11.4 | cpe:2.3:a:sendmail:sendmail:8.11.4:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.11.5 | cpe:2.3:a:sendmail:sendmail:8.11.5:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.11.6 | cpe:2.3:a:sendmail:sendmail:8.11.6:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.11.7 | cpe:2.3:a:sendmail:sendmail:8.11.7:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.12 | cpe:2.3:a:sendmail:sendmail:8.12:beta10:*:*:*:*:*:* |
| sendmail | sendmail | 8.12 | cpe:2.3:a:sendmail:sendmail:8.12:beta12:*:*:*:*:*:* |
| sendmail | sendmail | 8.12 | cpe:2.3:a:sendmail:sendmail:8.12:beta16:*:*:*:*:*:* |
| sendmail | sendmail | 8.12 | cpe:2.3:a:sendmail:sendmail:8.12:beta5:*:*:*:*:*:* |
| sendmail | sendmail | 8.12 | cpe:2.3:a:sendmail:sendmail:8.12:beta7:*:*:*:*:*:* |
| sendmail | sendmail | 8.12.0 | cpe:2.3:a:sendmail:sendmail:8.12.0:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.12.1 | cpe:2.3:a:sendmail:sendmail:8.12.1:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.12.2 | cpe:2.3:a:sendmail:sendmail:8.12.2:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.12.3 | cpe:2.3:a:sendmail:sendmail:8.12.3:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.12.4 | cpe:2.3:a:sendmail:sendmail:8.12.4:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.12.5 | cpe:2.3:a:sendmail:sendmail:8.12.5:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.12.6 | cpe:2.3:a:sendmail:sendmail:8.12.6:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.12.7 | cpe:2.3:a:sendmail:sendmail:8.12.7:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.12.8 | cpe:2.3:a:sendmail:sendmail:8.12.8:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.12.9 | cpe:2.3:a:sendmail:sendmail:8.12.9:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.12.10 | cpe:2.3:a:sendmail:sendmail:8.12.10:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.12.11 | cpe:2.3:a:sendmail:sendmail:8.12.11:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.13.0 | cpe:2.3:a:sendmail:sendmail:8.13.0:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.13.1 | cpe:2.3:a:sendmail:sendmail:8.13.1:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.13.1.2 | cpe:2.3:a:sendmail:sendmail:8.13.1.2:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.13.2 | cpe:2.3:a:sendmail:sendmail:8.13.2:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.13.3 | cpe:2.3:a:sendmail:sendmail:8.13.3:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.13.4 | cpe:2.3:a:sendmail:sendmail:8.13.4:*:*:*:*:*:*:* |
| sendmail | sendmail | 8.13.5 | cpe:2.3:a:sendmail:sendmail:8.13.5:*:*:*:*:*:*:* |