Thursday, December 4, 2025 Archive

Archived Security Snapshot

Critical vulnerabilities, curated daily for security professionals

Archived Security Brief

Thursday's vulnerability disclosure reflects elevated critical activity with 28 critical CVEs and 64 high-priority vulnerabilities, representing a 300% increase in critical vulnerabilities compared to Wednesday. Six CISA KEV vulnerabilities require remediation across multiple systems. The increase in critical CVEs (from 7 to 28) indicates heightened disclosure activity, while high-priority CVEs remained stable at 64.

  • Twenty-eight critical vulnerabilities disclosed (CVSS 9.0+), a 300% increase from Wednesday's count of 7 critical CVEs
  • Sixty-four high-priority vulnerabilities (CVSS 7.0-8.9), unchanged from Wednesday's count
  • Six CISA KEV vulnerabilities requiring remediation, up from 5 on Wednesday
  • Critical CVE frequency increased 138% compared to historical average, reflecting elevated disclosure activity

Immediate action: Security teams should review the 28 critical vulnerabilities and assess organizational exposure to the 64 high-priority CVEs. Organizations should continue addressing the 6 CISA KEV vulnerabilities. Detailed analyst comments are available for select CVEs to support remediation planning.

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

Section Navigation