Monday, June 22, 2026 Archive

Archived Security Snapshot

Critical vulnerabilities, curated daily for security professionals

Archived Security Brief

Monday's brief centers on critical vulnerabilities in widely used developer and web-platform software, led by Crawl4AI, SiYuan, and Cisco Catalyst SD-WAN Manager. The day brought 4 critical CVEs (down 20% from the prior day's 5) and 19 high-priority CVEs (down 72% from 67), for 23 total disclosures. Standout issues include CVE-2026-56265 (CVSS 9.8) in Crawl4AI, the paired CVE-2026-56395 and CVE-2026-56397 (CVSS 9.6) in SiYuan, and CVE-2026-11746 (CVSS 9.4) in LY Central Dogma. Splunk Enterprise, Cisco Catalyst SD-WAN Manager, and the LiteSpeed cPanel plugin are among four CVEs (CVSS 9.5) with confirmed active exploitation. No patches were available at disclosure across this set, so teams should prioritize compensating controls and monitoring for the affected products until vendor fixes ship.

  • Crawl4AI (CVE-2026-56265, CVSS 9.8) is the highest-scoring disclosure, alongside two SiYuan flaws (CVE-2026-56395, CVE-2026-56397, CVSS 9.6)
  • Critical CVEs fell 20% day-over-day to 4
  • High-priority CVEs dropped 72% to 19 from 67
  • Active exploitation spans Splunk, Cisco Catalyst SD-WAN Manager, LiteSpeed cPanel plugin, and Joomla Content Editor (all CVSS 9.5)
  • Patch availability is 0% across this set, affecting developer tools, web CMS plugins, and network management platforms
  • Four CVEs carry confirmed in-the-wild exploitation

Immediate action: Prioritize the actively exploited products — Splunk Enterprise and Cloud, Cisco Catalyst SD-WAN Manager, the LiteSpeed cPanel plugin, and Joomla Content Editor — for immediate review, along with internet-facing Crawl4AI and SiYuan deployments. With no vendor patches available at disclosure, apply access restrictions, network segmentation, and enhanced monitoring on affected systems until fixes are released.

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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