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Vulnerabilities

Vulnerability · CVE-2020-15069

Sophos XG Firewall Buffer Overflow Vulnerability

Published Jun 29, 2020 · catalog updated Jun 16, 2026 · Sophos XG Firewall

Patch now

CVE-2020-15069 is in the CISA known-exploited catalog, due Feb 27, 2025. Confirm Sophos XG Firewall against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
10.67%
Remediation
Remediation guidance
Affected products
cpe sophos/xg firewall firmware · vendor Sophos XG Firewall

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe sophos/xg firewall firmware17.5
  • vendor Sophos XG Firewallversion unspecified

How to fix CVE-2020-15069

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2020-15069 is in the CISA known-exploited catalog, due Feb 27, 2025. Confirm Sophos XG Firewall against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with sophos/xg firewall firmware 17.5. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

What should an analyst verify?

CWE-120: Classic Buffer Overflow. EPSS 10.67%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 29, 2020 · Catalog

    Detected

    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.

  2. Feb 6, 2025 · CISA KEV

    Known exploited

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

  3. Feb 27, 2025 · CISA KEV

    Remediation due

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

  4. Jun 16, 2026 · Catalog

    Updated

    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.

Sources

  • CISA KEVConfirmed exploitationCVE-2020-15069

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

    cisa.gov
  • CVE.orgVulnerability recordCVE-2020-15069

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2020-15069

    30-day exploitation probability 10.7%

    first.org
  • NIST NVDVulnerability recordCVE-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.

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2020-15069

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

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.