How severe is CVE-2020-15069?

CVE-2020-15069 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2020-15069?

Affected package information for CVE-2020-15069 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2020-15069?

No fixed version has been published for CVE-2020-15069 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2020-15069 actively exploited in the wild?

No public exploit code has been indexed for CVE-2020-15069 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2020-15069?

CVE-2020-15069 has an EPSS (Exploit Prediction Scoring System) score of 82.6%, placing it in the 99th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2020-15069 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2020-15069 (Sophos XG Firewall Buffer Overflow Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2025-02-06. CISA required all US federal civilian agencies to remediate this vulnerability by 2025-02-27. The required action was: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2020-15069?

CVE-2020-15069 is classified as CWE-120 (CWE-120). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Which products and versions are affected by CVE-2020-15069?

CVE-2020-15069 affects sophos xg firewall firmware (1 version, e.g. 17.5). Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2020-15069 published, and has it been updated?

CVE-2020-15069 was published on June 29, 2020 and was last updated on November 7, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2025-02-06 — agencies required to remediate by 2025-02-27

CVE-2020-15069

CRITICAL

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…

Published

Jun 29, 2020

Updated

Nov 7, 2025

Affected

0 pkgs

Patched

None yet

Exploits

None indexed

EPSS Exploitation Probability

via FIRST.org ↗

82.6%probability of exploitation in next 30 days

Very High Risk99th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

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.

Affected Products

1 product · 13 configurations

xg firewall firmwaresophos

≥ 17.0 && < 17.5

1 version

17.5

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2020-15069 in your stack?

O3 detects CVE-2020-15069 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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