Critical Alert 1 Active Exploit Detected Today

CVE-2026-104935 — Ivanti Connect Secure Authentication Bypass by Spoofing Vulnerability →
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October 14, 2026

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CVE-2021-3520NVD

Vulnerability Summary

There's a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash. The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well.
Severity Level
CRITICAL(9.8)
Published Date
Jun 2, 2021
Last Modified
Oct 14, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
3.22%Probability
Root Weakness (CWE)
CWE-190: Unknown/Unlisted Weakness ↗
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CWE-787: Unknown/Unlisted Weakness ↗
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CVSS v3.1 Base Metrics — Score 9.8 (CRITICAL)
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • Lz4 Project Lz4 >= 1.8.3 and < 1.9.4
  • Netapp Active Iq Unified Manager
  • Netapp Cloud Backup
  • Netapp Ontap Select Deploy Administration Utility
  • Oracle Communications Cloud Native Core Policy
  • Oracle Zfs Storage Appliance Kit
  • Splunk Universal Forwarder >= 8.2.0 and < 8.2.12
  • Splunk Universal Forwarder >= 9.0.0 and < 9.0.6
  • Splunk Universal Forwarder
Patched Versions
  • Lz4 Project Lz4 1.9.4
  • Splunk Universal Forwarder 8.2.12
  • Splunk Universal Forwarder 9.0.6
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🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
🚫Ad-Free — Uninterrupted experience.

External References