AUGUST 15, 2026
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Case File

CVE-2026-18727

MEDIUM · CVSS 6.5 EPSS 0.20% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-12 · Last synced 2026-08-15

CyberRota Analysis

AI-Generated

The vulnerability affects the open-iscsi component in Exchange, where an integer underflow and out-of-bounds read during DHCPv6 packet parsing can be exploited. An unauthenticated attacker on an adjacent network can send specially crafted IPv6 UDP traffic, potentially causing a denial of service through process crashes or service disruptions. Organizations using Exchange should prioritize addressing this vulnerability to mitigate the risk of service interruptions.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-18727
Severity
MEDIUM
CVSS
6.5
EPSS
0.20%
Exchange

Original NVD Description

A flaw was found in open-iscsi's iscsiuio component. This vulnerability involves an integer underflow and out-of-bounds read during Dynamic Host Configuration Protocol for IPv6 (DHCPv6) packet parsing. Specifically, crafted DHCPv6 Advertise traffic with a short User Datagram Protocol (UDP) length can cause the DHCPv6 payload length to underflow. An unauthenticated attacker on an adjacent network segment can exploit this by sending specially crafted IPv6 UDP traffic while the client is in an active DHCPv6 exchange, leading to a denial of service due to a process crash or service disruption.