CVE-2020-7247

highpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.990 · 100 %ileexploit · weaponizedEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 15 exploits · weaponized

Likely / severe?

99.0% (100th) EPSS

CVSS 10 · high

Is it mine?

10 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

added 2022-03-25remediate by 2022-04-15

required action Apply updates per vendor instructions.

EPSS · scored 2026-10-23

OpenSMTPD Remote Code Execution Vulnerability

smtp_mailaddr in smtp_session.c in OpenSMTPD 6.6, as used in OpenBSD 6.6 and other products, allows remote attackers to execute arbitrary commands as root via a crafted SMTP session, as demonstrated by shell metacharacters in a MAIL FROM field. This affects the "uncommented" default configuration. The issue exists because of an incorrect return value upon failure of input validation.

cvss

Technical severity, 0–10. One row per scoring source.

10.0

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 9.8–10

v2.010highAV:N/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 10 · impact 10

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondaryexploitability 3.9 · impact 5.9

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-755USprimaryCWE-78USprimaryCWE-252US

exploits (15)

Public proof-of-concept and weaponised exploit code.

exploit/unix/smtp/opensmtpd_mail_from_rceOpenSMTPD MAIL FROM Remote Code Executionweaponized · metasploit
EDB-47984OpenSMTPD 6.6.1 - Remote Code Executionfunctional · exploit_db
EDB-48038OpenSMTPD - MAIL FROM Remote Code Execution (Metasploit)functional · exploit_db
EDB-48051OpenSMTPD 6.4.0 < 6.6.1 - Local Privilege Escalation + Remote Code Executionfunctional · exploit_db
CyberCTF/vulhub-opensmtpd-cve-2020-7247Vulhub opensmtpd/CVE-2020-7247: OpenSMTPD MAIL FROM Command Injection (CVE-2020-7247), run with IsoloomPoC · poc_in_github
FiroSolutions/cve-2020-7247-exploitPython exploit of cve-2020-7247PoC · poc_in_github

affected products (10)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
The OpenBSD Project OpenSMTPD≤ 6.6fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 9fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 10fstec_bduRU
canonical ubuntu linux= 18.04nvdUScpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:*:*:*:*
canonical ubuntu linux= 19.10nvdUScpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:*:*:*:*
debian debian linux= 10.0nvdUScpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
debian debian linux= 9.0nvdUScpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*
fedoraproject fedora= 32nvdUScpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*
openbsd opensmtpd= 6.6nvdUScpe:2.3:a:openbsd:opensmtpd:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2020-01-29modified 2026-06-17

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+8603 more

references (47)

External citations — patches, advisories, analysis.

scry

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