Loading vulnerability…
CVE-2026-48131 is a high-severity heap out-of-bounds write vulnerability in the Check Point VPND service affecting the IKE fragment reassembly logic used during early IPsec VPN connection establishment. The flaw is triggered when the service processes a malformed IKE fragment carrying a sequence number value of zero on UDP port 500. Improper validation of this fragment value causes an unsigned integer underflow in the reassembly path, and the resulting underflowed value is then used as an index or offset into a heap-allocated reassembly buffer. This leads to out-of-bounds heap memory corruption and causes the VPND process to terminate unexpectedly before authentication is completed.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Check Point vulnerability addressed in the June 9, 2026 security updates; specific details are not provided in the content.
A remotely triggerable heap out-of-bounds write in Check Point VPND's IKE fragment reassembly logic caused by a zero-valued sequence number leading to unsigned integer underflow, resulting in denial of service of VPN tunnel negotiation.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.