# CVE-2020-15069: Sophos XG Firewall Buffer Overflow Vulnerability

> CVE-2020-15069: Sophos XG Firewall Buffer Overflow Vulnerability. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2020-15069
Last updated: 2025-10-21T23:35:41Z

- Published: 2020-06-29 17:30 UTC · Updated: 2025-10-21 23:35 UTC · Assigner: mitre
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 10.7%, 96th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2025-02-06, federal due date 2025-02-27, ransomware use: Unknown

## 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.

## CISA required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

## Affected vendors and products

- Sophos: XG Firewall

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2020-15069)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2020-15069)
- [https://community.sophos.com/b/security-blog/posts/advisory-buffer-overflow-vulnerability-in-user-portal](https://community.sophos.com/b/security-blog/posts/advisory-buffer-overflow-vulnerability-in-user-portal)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2020-15069 · Markdown: https://rewindex.com/cve/CVE-2020-15069.md · JSON: https://rewindex.com/api/v1/cves/CVE-2020-15069 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T04:04:00.587Z