What’s Vulnerable › Vulnerabilities

CVE-2016-9963

• Severity: medium (CVSS 5.9 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-02-01 · updated 2026-06-17
• Weakness: CWE-320

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.

Affected products

• Canonical Ubuntu Linux: 12.04, 14.04, 16.04, 16.10
• Debian Linux: 8.0
• Exim: through 4.87

References

• http://www.debian.org/security/2016/dsa-3747
• http://www.exim.org/static/doc/CVE-2016-9963.txt
• http://www.securityfocus.com/bid/94947
• http://www.securitytracker.com/id/1037484
• http://www.ubuntu.com/usn/USN-3164-1
• https://bugs.exim.org/show_bug.cgi?id=1996
• http://www.debian.org/security/2016/dsa-3747
• http://www.exim.org/static/doc/CVE-2016-9963.txt
• http://www.securityfocus.com/bid/94947
• http://www.securitytracker.com/id/1037484
• http://www.ubuntu.com/usn/USN-3164-1
• https://bugs.exim.org/show_bug.cgi?id=1996

Get alerted when CVE-2016-9963 or the next vulnerability affects your stack