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Exploited vulnerability · CISA KEV

Is CVE-2020-15069 exploited? Yes: in CISA KEV since 6 Feb 2025

Gociux · Sophos XG Firewall · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2020-15069, Sophos XG Firewall Buffer Overflow Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 6 Feb 2025, 1683 days after it was published. It affects Sophos XG Firewall, an internet-facing product of the kind attackers use for initial access. If you run it, CISA's required action is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 6 Feb 2025
ransomwareNot knownno confirmed use
EPSStop 5%very likely to be exploited
severity9.8CVSS 3.1 · critical
US federal due27 Feb 2025BOD 22-01 deadline

What it is

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

VendorSophos (7 exploited CVEs in KEV)
ProductXG Firewall
VulnerabilitySophos XG Firewall Buffer Overflow Vulnerability
WeaknessCWE-120
Published29 Jun 2020
Added to KEV6 Feb 2025
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for XG Firewall in your asset inventory, including appliances and cloud images. Stack check lists every exploited Sophos CVE at once.
  2. Apply the fix. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 29 Jun 2020.
  4. Get told next time. Email alerts when CISA adds a CVE for Sophos.

References

Questions

Is CVE-2020-15069 being exploited?

Yes. CISA added CVE-2020-15069 to the Known Exploited Vulnerabilities catalog on 6 Feb 2025, which means there is reliable evidence of exploitation in the wild.

Is CVE-2020-15069 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2020-15069?

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Check Sophos's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected XG Firewall and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in February 2025 · Sophos scorecard · act-now radar.

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