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CVE-2020-15069

Sophos XG Firewall Buffer Overflow

9.8 CRITICALActively exploited (CISA KEV)EPSS 10.7%
  1. Published29 Jun 2020
  2. Added to CISA KEV6 Feb 2025
  3. Remediation due27 Feb 2025
Actively exploited (CISA KEV)

Sophos XG Firewall contains a buffer overflow vulnerability that allows for remote code execution via the "HTTP/S bookmark" feature.

Added to KEV: 6 Feb 2025Federal remediation due: 27 Feb 2025

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Sophos Xg Firewall Firmware≥ 17.0 < 17.5 · 17.5

Remediation

Fixed in
Sophos Xg Firewall Firmware≥ 17.5

References

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Frequently asked

Is CVE-2020-15069 being actively exploited?

Yes. CVE-2020-15069 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 6 Feb 2025.

How severe is CVE-2020-15069?

CVE-2020-15069 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 10.7% probability of exploitation.

Which products are affected by CVE-2020-15069?

Affected products include Sophos Xg Firewall Firmware.

How do I fix CVE-2020-15069?

Upgrade affected software to a fixed version, for example Sophos Xg Firewall Firmware 17.5 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2020-15069 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.