CVE-2020-14954

MEDIUM
5.9
CVSS Score
Published: June 21, 2020 at 04:55 PM UTC
Updated: June 17, 2026 at 02:55 AM UTC
6 products affected across 6 vendorsDebian LinuxFedoraUbuntu Linux

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Severity
MEDIUM5.9
Exploit prediction
EPSS 2%

Description

Mutt before 1.14.4 and NeoMutt before 2020-06-19 have a STARTTLS buffering issue that affects IMAP, SMTP, and POP3. When a server sends a "begin TLS" response, the client reads additional data (e.g., from a man-in-the-middle attacker) and evaluates it in a TLS context, aka "response injection."

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.14.4
Affected range stops below 1.14.4, so it looks safe — our inference, not a vendor statement
v < 20200619
Affected range stops below 20200619, so it looks safe — our inference, not a vendor statement

CVSS

Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-74

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