Page generated: 08 Nov 2026, 07:44 UTC
← Dashboard

CVE-2020-7247

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" defa…

Read full description
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 9.8 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
9.0/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 9.8: +1.47
  • Fresh EPSS: 98.97%: +0.49

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 5 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

Unit 42
Press · 14 Oct 2021, 07:00 · Attackers Are Taking Advantage of the Open-Source Service Interactsh for Malicious Purposes - Unit 42
www.trendmicro.com
Press · 12 Mar 2020, 07:00 · CVE-2020-8794 Can Lead to Privilege Escalation and RCE - www.trendmicro.com
Qualys
Press · 29 Jan 2020, 08:00 · OpenBSD OpenSMTPD Remote Code Execution Vulnerability (CVE-2020-7247) - Qualys
Qualys
Press · 11 Dec 2019, 08:00 · OpenBSD Local Privilege Escalation Vulnerability (CVE-2019-19726) - Qualys
Qualys
Press · 05 Dec 2019, 08:00 · OpenBSD Multiple Authentication Vulnerabilities - Qualys

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 9.0 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

3

Public exploit entries / repo candidates

See 3 repos with metrics
RepositoryStarsForksLanguageUpdated
QTranspose/CVE-2020-7247-exploit113Python17 Feb 2021, 09:23
f4T1H21/CVE-2020-724721Python10 Jul 2021, 11:26
SimonSchoeni/CVE-2020-7247-POC20Python20 Jan 2022, 18:36
Public exploit evidence
Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 9.8; EPSS 99.0%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:20.659321+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
First press mention
05 Dec 2019, 08:00
Published
29 Jan 2020, 15:53
Latest press mention
14 Oct 2021, 07:00
Added to the CISA KEV catalog
25 Mar 2022, 00:00
Score calculated
05 Nov 2026, 13:58
PoCs on GitHub
3 repositories