CVE-2021-38371

HIGH
Published Aug 10, 20214y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Aug 10, 2021 4y ago
Last Modified Jun 17, 2026 2w ago

Description

The STARTTLS feature in Exim through 4.94.2 allows response injection (buffering) during MTA SMTP sending.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity High
Availability None

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-74

Affected Products 1

VendorProductVersionRange
eximexim* ≤4.94.2

References 4

  • lists.debian.org https://lists.debian.org/debian-lts-announce/2024/10/msg00029.html
  • nostarttls.secvuln.info https://nostarttls.secvuln.info
    Tool Signature
  • exim.org https://www.exim.org
    Product
  • exim.org https://www.exim.org/static/doc/security/CVE-2021-38371.txt
    Broken LinkVendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.