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CVE-2019-10149

A flaw was found in Exim versions 4.87 to 4.91 (inclusive). Improper validation of recipient address in deliver_message() function in /src/deliver.c may lead to remote command execution.

CVSS 9.0 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.8/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 9: +1.35
  • Fresh EPSS: 99.96%: +0.50

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

Sources: 10 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

Qualys
Press · 05 May 2021, 07:00 · 21Nails: Multiple Critical Vulnerabilities in Exim Mail Server - Qualys
Hackaday
Press · 05 Jun 2020, 07:00 · This Week In Security: Exim, Apple Sign-in, Cursed Wallpaper, And Nuclear Secrets - Hackaday
TechTarget
Press · 04 Jun 2020, 07:00 · Attacks on Exim vulnerability continue one year later - TechTarget
TechTarget
Press · 04 Jun 2020, 07:00 · Attacks on Exim vulnerability continue one year later - TechTarget
BleepingComputer
Press · 02 Jun 2020, 07:00 · Critical Exim bugs being patched but many servers still at risk - BleepingComputer
See all 10 source documents
Security Magazine
Press · 29 May 2020, 07:00 · NSA: Sandworm Actors Exploiting Vulnerability in Exim Mail Transfer Agent - Security Magazine
National Security Agency (NSA) (.gov)
Press · 28 May 2020, 07:00 · Exim Mail Transfer Agent Actively Exploited by Russian GRU Cyber Actors - National Security Agency (NSA) (.gov)
Security Affairs
Press · 06 Sep 2019, 07:00 · CVE-2019-15846 Exim mail server flaw allows Remote Code Execution - Security Affairs
Qualys
Press · 14 Jun 2019, 07:00 · Exim MTA Vulnerability (The Return of the WIZard – CVE-2019-10149) - Qualys
Ars Technica
Press · 06 Jun 2019, 07:00 · Millions of machines affected by command execution flaw in Exim mail server - Ars Technica

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 8.8 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

4

Public exploit entries / repo candidates

See 4 repos with metrics
RepositoryStarsForksLanguageUpdated
MNEMO-CERT/PoC--CVE-2019-10149_Exim145Python18 Jun 2019, 14:57
uyerr/PoC_CVE-2019-10149--rce11Shell24 Nov 2024, 23:45
qlusec/CVE-2019-1014900—06 Sep 2024, 17:21
VoyagerOnne/Exim-CVE-2019-1014900Python11 Apr 2025, 13:43
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; EPSS 100.0%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, no user interaction, additional attack conditions.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:03.858787+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
05 Jun 2019, 00:00
First press mention
06 Jun 2019, 07:00
Latest press mention
05 May 2021, 07:00
Added to the CISA KEV catalog
10 Jan 2022, 00:00
Score calculated
05 Nov 2026, 13:58
PoCs on GitHub
4 repositories