Vulnerability in Exim

CVE-2020-28026

Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters, relevant in non-default configurations that enable Delivery Status Notification (DSN). Certain uses of ORCPT= can place a newline into a spool header file, and indirectly…

EPSS: 0.093 (94.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

  • Exim
  • N/a — versions n/a

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2020-28026?
CVE-2020-28026 is a critical-severity vulnerability in Exim. CVSS score: 9.8/10. Published 2021-05-06.
How severe is CVE-2020-28026?
Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2020-28026 known to be exploited?
4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.