Cyber Resilience

CVE-2020-15955

MediumRCE

Published: 17 August 2021

Published
17 August 2021
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS Score 0.0032 55.6th percentile
Risk Priority 12 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2020-15955 is a medium-severity Command Injection (CWE-77) vulnerability in Fehcom S\/Qmail. Its CVSS base score is 5.9 (Medium).

Operationally, ranked in the top 44.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

In s/qmail through 4.0.07, an active MitM can inject arbitrary plaintext commands into a STARTTLS encrypted session between an SMTP client and s/qmail. This allows e-mail messages and user credentials to be sent to the MitM attacker.

CWE(s)
CWE-77

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

fehcom
s\/qmail
≤ 4.0.07

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References