CVE-2020-15069
Sophos XG Firewall Buffer Overflow Vulnerability
Sophos XG Firewall
Sophos XG Firewall 17.x through v17.5 MR12 allows a Buffer Overflow and remote code execution via the HTTP/S Bookmarks feature for clientless access. Hotfix HF062020.1 was published for all firewalls running v17.x.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 6 February 2025. US federal agencies were required to remediate it by 27 February 2025.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 10.7%, which is higher than 95.8% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2020-15069 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2020-15069.
What does CVE-2020-15069 affect?
CVE-2020-15069 affects Sophos XG Firewall. Sophos XG Firewall 17.x through v17.5 MR12 allows a Buffer Overflow and remote code execution via the HTTP/S Bookmarks feature for clientless access. Hotfix HF062020.1 was published for all firewalls running v17.x.
How severe is CVE-2020-15069?
CVE-2020-15069 is rated CRITICAL with a CVSS base score of 9.8. EPSS puts the probability of exploitation in the next 30 days at 10.7%, higher than 95.8% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 27 February 2025.
How should organisations respond to CVE-2020-15069?
Apply the vendor patch for Sophos XG Firewall as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.