CVE-2004-0156

Ssmtp vulnerability

CVSS

5.0

EPSS

3.5%

EPSS pct

88th

Exploited

No known

Format string vulnerabilities in the (1) die or (2) log_event functions for ssmtp before 2.50.6 allow remote mail relays to cause a denial of service and possibly execute arbitrary code.

Affected vendor

Ssmtp

Affected product

Ssmtp

CVSS vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Published

2004-06-01

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to availability.

Its EPSS score of 3.5% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 88% of all scored CVEs.

Check your external exposure to CVE-2004-0156

Confirm whether Ssmtp Ssmtp is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2004-0156.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2004-0156

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2004-0156 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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