Monday, December 29, 2025 Archive

Archived Security Snapshot

Critical vulnerabilities, curated daily for security professionals

Archived Security Brief

Yesterday's disclosures include 3 critical CVEs, a 50% increase from the prior day's 2 critical vulnerabilities. High-priority CVEs doubled to 26, indicating increased vulnerability disclosure activity following the weekend. Nine actively exploited vulnerabilities were added to the KEV catalog, including CVE-2025-6218 affecting WinRAR, CVE-2025-62221 targeting Microsoft Windows, and CVE-2025-14174 in Google Chromium. Critical vulnerabilities CVE-2025-52691, CVE-2025-15226, and CVE-2025-15228 all involve arbitrary file upload flaws affecting multiple products. Patch availability currently stands at 0%, requiring organizations to implement compensating controls until vendor fixes are released.

  • 3 critical CVEs disclosed (50% increase from prior day's 2)
  • 26 high-priority CVEs identified (100% increase from 13)
  • 9 actively exploited vulnerabilities including WinRAR, Windows, GeoServer, and Chrome
  • 0% patch availability requires immediate compensating controls
  • Arbitrary file upload vulnerabilities affect Sunnet WMPro and WELLTEND BPMFlowWebkit

Immediate action: Prioritize review of Microsoft Windows, Google Chrome, and WinRAR installations given active exploitation status. With no patches currently available for disclosed vulnerabilities, implement network segmentation and monitor for indicators of compromise while awaiting vendor 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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