Thursday, December 18, 2025 Archive

Archived Security Snapshot

Critical vulnerabilities, curated daily for security professionals

Archived Security Brief

Thursday's disclosure includes 21 critical-severity vulnerabilities (CVSS 9.0+), representing a 91% increase from yesterday's 11 critical findings. High-priority vulnerabilities (CVSS 7.0-8.9) decreased slightly to 67, down 6% from the previous day's 71. Seventeen actively exploited vulnerabilities appear on today's brief, including CVE-2025-20393 affecting Cisco products (CVSS 10), CVE-2025-59718 targeting Fortinet systems, and CVE-2025-6218 in WinRAR. Notable critical disclosures include CVE-2025-62521 (CVSS 10) in ChurchCRM and CVE-2025-67781 (CVSS 9.9) affecting DriveLock products. Current patch availability stands at 0%, requiring organizations to implement compensating controls while monitoring vendor advisories.

  • 21 critical CVEs disclosed, up 91% from yesterday's 11
  • 67 high-priority vulnerabilities, down 6% from 71
  • 17 actively exploited CVEs including Cisco, Fortinet, SonicWall, and WinRAR
  • 0% patch availability requires compensating controls and enhanced monitoring
  • Affected systems include Android Framework, Microsoft Windows, GeoServer, and D-Link routers

Immediate action: Prioritize network segmentation and access controls for systems affected by actively exploited CVEs, particularly Cisco, Fortinet, and SonicWall appliances. With no patches currently available, implement detection rules for exploitation attempts and restrict exposure of vulnerable services. Thursday timing allows for assessment and control implementation before reduced weekend staffing.

How to read this brief

CVSS score (e.g. 9.1) — severity from 0–10. Red marks critical (9+), orange high (7–8.9).

Exploitability — how hard the flaw is to attack, read from the CVSS vector:

  • Network / Adjacent / Local / Physical — how close an attacker must get. Network means reachable over the internet.
  • No / Low / High privileges — the access they need first. No privileges means no login required.
  • No interaction / User interaction — whether a victim has to do something (open a file, click a link). No interaction means fully automatable.

The lower the bar on all three, the easier to exploit at scale — “Network · No privileges · No interaction” is the worst case: hit from anywhere, no credentials, no victim action.

Actively exploited — confirmed under attack in the wild (CISA’s Known Exploited Vulnerabilities catalog). Prioritize these regardless of score.

EPSS · Nth percentile — FIRST.org’s estimated chance a flaw is exploited within 30 days. We flag it only in the top 10% — a statistical signal it’s unusually likely to be targeted, separate from whether attacks are confirmed.

💡 Tip: Swipe CVE cards left to ⭐ star, right to ❌ remove

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