9

CVE-2020-28021: exim

CVSS: 9.0v2.0HighModified
AliasesUBUNTU-CVE-2020-28021DEBIAN-CVE-2020-28021
Published 06-05-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-28021 is a high (CVSS 9.0) vulnerability in exim. EPSS estimates a 4.14% chance of exploitation in the next 30 days, higher than 90.7% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.0/10
010
High · v2.0 (NVD)
EPSS score
4.14%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 7 · Related 5
DLA-2650-1DSA-4912-1OPENSUSE-SU-2021:0677-1OPENSUSE-SU-2021:0753-1OPENSUSE-SU-2021:0754-1OPENSUSE-SU-2024:10746-1

Timeline

  1. 06-05-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters. An authenticated remote SMTP client can insert newline characters into a spool file (which indirectly leads to remote code execution as root) via AUTH= in a MAIL FROM command.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

4.14%

Chance of exploitation in the next 30 days

Percentile

91%

Versus all other CVEs

30-day change

0.00 pp

From 4.14% on 19-09-2026

19-09-202619-10-2026
EPSS score
4.14%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Debian1 product
  • exim4< 4.94.2-1
Exim1 product
  • exim≥ 4.00, < 4.94.2
Ubuntu1 product
  • exim4< 4.82-3ubuntu2.4+esm3 | < 4.86.2-2ubuntu2.6+esm1 | < 4.90.1-1ubuntu1.8 | < 4.93-13ubuntu1.5

3 vendors · 3 products

References

5 links