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CVE-2020-28015

24
FAUCET Score

CVE-2020-28015 is a high-severity vulnerability affecting Exim mail transfer agent versions prior to 4.94.2, stemming from improper neutralization of line delimiters. This flaw allows local users to manipulate root process behavior by injecting newline characters into recipient addresses. With a CVSS score of 7.8, it presents a significant risk of high impact to confidentiality, integrity, and availability, though it requires local access and low privileges. While not listed in CISA's KEV catalog and lacking public exploit intelligence in Metasploit, Nuclei, or ExploitDB, it has garnered some community discussion and media coverage, indicating awareness within the cybersecurity community.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.00, < 4.94.2CPE matchmatch criteria
cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.38%
Probability of exploitation in next 30 days
EPSS Percentile
30.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0038 is in the 69th percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

exim.org / static/doc/security/CVE-2020-qualys/CVE-2020-28015-NLEND.txt
Vendor Advisory