CVE-2020-15069

CVE-2020-15069 is a critical-severity vulnerability in Sophos Xg Firewall Firmware with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2025-02-06). The underlying weakness is classified as CWE-120.

Key facts

• Severity: Critical (CVSS 3.x base score 9.8)
• CVSS v2: 7.5
• EPSS exploit prediction: 11% (95th percentile)
• Actively exploited: Yes — listed in CISA KEV (added 2025-02-06)
• EU (EUVD) id: EUVD-2020-7197
• EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2025-02-06)
• Weakness: CWE-120
• Affected product: Sophos Xg Firewall Firmware
• Published: 2020-06-29
• Last modified: 2026-06-17

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.

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 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-15069 being actively exploited?

Yes. CVE-2020-15069 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-02-06, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2020-15069?

CVE-2020-15069 primarily affects Sophos Xg Firewall Firmware. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-15069?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2020-15069 have an EU (EUVD) identifier?

Yes. CVE-2020-15069 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-7197. It is also flagged as exploited in the EUVD (since 2025-02-06).

When was CVE-2020-15069 published?

CVE-2020-15069 was published on 2020-06-29 and last updated on 2026-06-17.

References

• https://community.sophos.com/b/security-blog/posts/advisory-buffer-overflow-vulnerability-in-user-portal
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-15069

Affected products (13)

• cpe:2.3:o:sophos:xg_firewall_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:sophos:xg_firewall_firmware:17.5:-:*:*:*:*:*:*
• cpe:2.3:o:sophos:xg_firewall_firmware:17.5:maintenance_release1:*:*:*:*:*:*
• cpe:2.3:o:sophos:xg_firewall_firmware:17.5:maintenance_release10:*:*:*:*:*:*
• cpe:2.3:o:sophos:xg_firewall_firmware:17.5:maintenance_release11:*:*:*:*:*:*
• cpe:2.3:o:sophos:xg_firewall_firmware:17.5:maintenance_release12:*:*:*:*:*:*
• cpe:2.3:o:sophos:xg_firewall_firmware:17.5:maintenance_release3:*:*:*:*:*:*
• cpe:2.3:o:sophos:xg_firewall_firmware:17.5:maintenance_release4:*:*:*:*:*:*
• cpe:2.3:o:sophos:xg_firewall_firmware:17.5:maintenance_release5:*:*:*:*:*:*
• cpe:2.3:o:sophos:xg_firewall_firmware:17.5:maintenance_release6:*:*:*:*:*:*
• cpe:2.3:o:sophos:xg_firewall_firmware:17.5:maintenance_release7:*:*:*:*:*:*
• cpe:2.3:o:sophos:xg_firewall_firmware:17.5:maintenance_release8:*:*:*:*:*:*
• cpe:2.3:o:sophos:xg_firewall_firmware:17.5:maintenance_release9:*:*:*:*:*:*

More vulnerabilities in Sophos Xg Firewall Firmware

• CVE-2020-15504 — Critical (CVSS 9.8): A SQL injection vulnerability in the user and admin web interfaces of Sophos XG Firewall v18.0 MR1 and older…
• CVE-2022-3713 — High (CVSS 8.8): A code injection vulnerability allows adjacent attackers to execute code in the Wifi controller of Sophos Firewall…
• CVE-2020-17352 — High (CVSS 8.8): Two OS command injection vulnerabilities in the User Portal of Sophos XG Firewall through 2020-08-05 potentially allow…
• CVE-2022-3696 — High (CVSS 7.2): A post-auth code injection vulnerability allows admins to execute code in Webadmin of Sophos Firewall releases older…
• CVE-2022-3226 — High (CVSS 7.2): An OS command injection vulnerability allows admins to execute code via SSL VPN configuration uploads in Sophos…
• CVE-2022-3709 — Medium (CVSS 6.8): A stored XSS vulnerability allows admin to super-admin privilege escalation in the Webadmin import group wizard of…

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