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CVE-2020-15069

9.8, critical Known exploited

Sophos XG Firewall Buffer Overflow Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
9.8, critical critical CVSS v3.1
EPSS, next 30 days
11% higher than 95.7% of scored CVEs
Exploitation
Confirmed in the wild
Published
29 Jun 20206 years ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 6 Feb 2025. US federal agencies had to remediate by 27 Feb 2025, a deadline that has passed.

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

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.

Details

Vendor
Sophos
Product
Xg Firewall Firmware
Weakness
CWE-120 (opens in a new tab)
Status
Analyzed
Updated
17 Jun 2026
Assigner
cve@mitre.org

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References 2

Advisories 1

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Sophos CVEs

Every Sophos CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2023-1671 Sophos Web Appliance Command Injection Vulnerability KEV EPSS 100% 9.8, critical
  • CVE-2022-3236 Sophos Firewall Code Injection Vulnerability KEV EPSS 99% 9.8, critical
  • CVE-2022-1040 Sophos Firewall Authentication Bypass Vulnerability KEV EPSS 100% 9.8, critical
  • CVE-2020-29574 CyberoamOS (CROS) SQL Injection Vulnerability KEV EPSS 5% 9.8, critical
  • CVE-2020-25223 Sophos SG UTM Remote Code Execution Vulnerability KEV EPSS 97% 9.8, critical
  • CVE-2020-12271 Sophos SFOS SQL Injection Vulnerability KEV EPSS 42% 9.8, critical

Beyond this page

Is CVE-2020-15069 in your network?

This page tells you how dangerous CVE-2020-15069 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2020-15069 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.