CVE-2019-16928
9.8
CRITICAL
CVSS 3.1
EPSS 41.6% · 99th pctCISA KEV · Exploited in the wild
2019-09-27•Updated 2025-10-21•KEV 2022-03-03
CISA Known Exploited Vulnerabilities
Exim Out-of-bounds Write Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
Added to KEV
2022-03-03
Remediation due
2022-03-17
Required action
Apply updates per vendor instructions.
CISA notes
https://nvd.nist.gov/vuln/detail/CVE-2019-16928
Description
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.
Severity
CVSS 3.1 · CISA9.8 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSSVC · CISA-ADP
Exploitationactive
Automatableyes
Technical impacttotal
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| - | - | n/a |
References
14 LinksVendor advisories
Mailing lists
- [oss-security] 20190928 Exim CVE-2019-16928 RCE using a heap-based buffer overflow
- [oss-security] 20190928 Re: Exim CVE-2019-16928 RCE using a heap-based buffer overflow
- [oss-security] 20190928 Re: Exim CVE-2019-16928 RCE using a heap-based buffer overflow
- [oss-security] 20190929 Re: Exim CVE-2019-16928 RCE using a heap-based buffer overflow
- 20190929 [SECURITY] [DSA 4536-1] exim4 security update
Record Details
Published
2019-09-27
Last updated
2025-10-21
Assigner (CNA)
mitre
Credited to
-
CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.