CVE-2015-4278

No fix known EPSS 2%

Cisco Email Security Appliance (ESA) devices with software 8.5.6-106 and 9.5.0-201 allow remote attackers to cause a denial of service (per-domain e-mail reception outage) by placing malformed DMARC policy data in DNS TXT records for a domain, aka Bug ID CSCuv14806.