Page generated: 09 Nov 2026, 05:44 UTC
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CVE-2019-16928

Exim 4.92 through 4.92.2 allows remote code execution, a different vulnerability than CVE-2019-15846. There is a heap-based buffer overflow in string_vformat in string.c involving a long EHLO command.

CVSS 9.8 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.7/10
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: 41.64%: +0.21

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

Sources: 6 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

BleepingComputer
Press · 04 Mar 2022, 08:00 · CISA warns organizations to patch 95 actively exploited bugs - BleepingComputer
BankInfoSecurity
Press · 03 Jun 2020, 07:00 · Thousands of Exim Servers Vulnerable to Critical Flaw: Report - BankInfoSecurity
BleepingComputer
Press · 02 Jun 2020, 07:00 · Critical Exim bugs being patched but many servers still at risk - BleepingComputer
www.trendmicro.com
Press · 11 Oct 2019, 07:00 · Partnership Advances DevSecOps, Cybersecurity Issues - www.trendmicro.com
www.trendmicro.com
Press · 10 Oct 2019, 07:00 · CVE-2019-16928: Exim Vuln Exploit via EHLO Strings - www.trendmicro.com
See all 6 source documents
Rapid7
Press · 01 Oct 2019, 07:00 · Exim Vuln (CVE-2019-16928): Exposure Details & Remediation Advice - Rapid7

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 8.7 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

0

Public exploit entries / repo candidates

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 41.6%
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 13:58:06.921295+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
27 Sep 2019, 20:07
First press mention
01 Oct 2019, 07:00
Added to the CISA KEV catalog
03 Mar 2022, 00:00
Latest press mention
04 Mar 2022, 08:00
Score calculated
05 Nov 2026, 13:58