Sunday, December 21, 2025 Archive

Archived Security Snapshot

Critical vulnerabilities, curated daily for security professionals

Archived Security Brief

Sunday's vulnerability disclosures dropped to 2 critical CVEs, an 85% decrease from Saturday's 13 critical issues. High-priority vulnerabilities also declined significantly to 39, down 57% from yesterday's 91. The actively exploited vulnerability count holds steady at 17 KEV entries, including threats affecting Fortinet products, Android Framework, SonicWall SMA1000, Cisco products, and Microsoft Windows. Notable critical vulnerabilities include CVE-2025-13329 and CVE-2025-13619, both WordPress plugin file upload and privilege escalation flaws. With 0% patch availability reported, organizations should prioritize network segmentation and access controls for affected systems.

  • 2 critical CVEs disclosed, down 85% from Saturday's 13
  • 39 high-priority vulnerabilities, a 57% decrease from yesterday
  • 17 actively exploited vulnerabilities affecting Fortinet, Android, SonicWall, Cisco, and Microsoft
  • 0% patch availability requires compensating controls
  • WordPress plugins, WinRAR, GeoServer, and Apple products among affected systems

Immediate action: Focus immediate attention on the 17 actively exploited KEV vulnerabilities, particularly those affecting perimeter devices like Fortinet, SonicWall SMA1000, and WatchGuard Firebox. Implement network segmentation, disable unnecessary services, and enhance monitoring for affected systems until patches become available. Weekend security teams should maintain heightened awareness given the number of exploitation-active vulnerabilities.

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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