Sophos XG Firewall Buffer Overflow Vulnerability
n/a — n/a
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.
9.8
10.7%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- Jun 29, 2020
- Modified
- Oct 21, 2025
- Added to KEV
- Feb 6, 2025
- Federal patch due
- Feb 27, 2025
CISA required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Weakness classification
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2020-15069, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2020-15069 were found at last check. Absence here is not proof no exploit exists - see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is CVE-2020-15069?
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 has a CVSS base score of 9.8 out of 10 (CVSS 3.1).
Is CVE-2020-15069 actively exploited in the wild?
Yes. CVE-2020-15069 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Feb 6, 2025, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2020-15069?
10.7% - meaning FIRST.org's EPSS model estimates a 10.7% probability this vulnerability will be exploited in the wild within 30 days (95% percentile among all scored CVEs).
What type of vulnerability is CVE-2020-15069?
CVE-2020-15069 is classified under CWE-120 (CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')).
Cross-checked against
Impactr finds and proves whether CVE-2020-15069 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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