CVE-2020-15069 Sophos XG Firewall Buffer Overflow

Exploited in the wild Critical 9.8 Published 29 Jun 2020 Updated 21 Oct 2025

Remote attackers can execute arbitrary code on Sophos XG Firewalls via a buffer overflow in the HTTP/S Bookmarks feature.

Exploited in the wild: Since 6 Feb 2025
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-15069?

CVE-2020-15069 is a critical memory corruption vulnerability in n/a, published on 29 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-120

Which versions are affected by CVE-2020-15069?

It affects 1 product.

Products include Sophos Xg Firewall Firmware.

How do I fix CVE-2020-15069?

No fix has been published for CVE-2020-15069 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 27 Feb 2025.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2020-15069 being exploited?

Yes. Attackers have exploited CVE-2020-15069 in the wild since at least 6 Feb 2025.

Sources

Also known as GHSA-x7vj-wqq4-cq4v.