Tuesday, December 23, 2025 Archive

Archived Security Snapshot

Critical vulnerabilities, curated daily for security professionals

Archived Security Brief

This brief identifies 15 critical vulnerabilities (CVSS 9.0+), a substantial increase from yesterday's 4 critical CVEs. High-priority vulnerabilities rose to 36, an 89% increase from the previous day's 19. The 15 actively exploited vulnerabilities include CVE-2025-40602 affecting SonicWall SMA1000 appliances, CVE-2025-20393 in Cisco products, CVE-2025-6218 in WinRAR, and CVE-2025-62221 targeting Microsoft Windows. Notable critical disclosures include multiple Tenda product vulnerabilities (CVE-2025-15006, CVE-2025-15007, CVE-2025-15010) and an authentication bypass in Xiongmai devices (CVE-2025-65856). Current patch availability stands at 0%, requiring organizations to implement compensating controls while monitoring for vendor updates.

  • 15 critical CVEs disclosed today, up 275% from yesterday's 4 critical vulnerabilities
  • 36 high-priority vulnerabilities identified, representing an 89% increase from previous day
  • 15 actively exploited CVEs include SonicWall, Cisco, Microsoft Windows, WinRAR, and Google Chromium
  • 0% patch availability requires immediate implementation of compensating controls
  • Tenda networking products and Xiongmai devices among multiple affected systems requiring attention

Immediate action: Prioritize review of actively exploited vulnerabilities affecting SonicWall SMA1000, Cisco products, Microsoft Windows, and WinRAR installations. With no patches currently available, implement network segmentation, restrict access to affected systems, and enable enhanced logging for indicators of compromise. Security teams should monitor vendor security advisories throughout the week for emergency patch releases.

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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