VulnerabilityModified
CVE-2016-9963
Exim before 4.87.1 might allow remote attackers to obtain the private DKIM signing key via vectors related to log files and bounce messages.
MEDIUM 5.9EPSS 3.10%
Does this matter?
Lower severity and a low EPSS score (3.10%). Track it; it rarely justifies an emergency change on its own.
Description
Exim before 4.87.1 might allow remote attackers to obtain the private DKIM signing key via vectors related to log files and bounce messages.
- CVSS 3.0
- 5.9 MEDIUMCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 3.10% probability · 88th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-320
- Affected
- exim/exim · canonical/ubuntu linux · debian/debian linux
- Source
- cve@mitre.org
EPSS 3.1% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.debian.org/security/2016/dsa-3747Third Party Advisory
- http://www.exim.org/static/doc/CVE-2016-9963.txtMitigation, Vendor Advisory
- http://www.securityfocus.com/bid/94947Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037484Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-3164-1Third Party Advisory
- https://bugs.exim.org/show_bug.cgi?id=1996Issue Tracking, Mitigation, Vendor Advisory
- http://www.debian.org/security/2016/dsa-3747Third Party Advisory
- http://www.exim.org/static/doc/CVE-2016-9963.txtMitigation, Vendor Advisory
- http://www.securityfocus.com/bid/94947Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037484Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-3164-1Third Party Advisory
- https://bugs.exim.org/show_bug.cgi?id=1996Issue Tracking, Mitigation, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.