SEPTEMBER 17, 2026
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Case File

CVE-2026-18238

MEDIUM · CVSS 5 EPSS 0.18% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-05 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

The vulnerability affects the rpcap client code, which improperly validates headers in RPCAP_MSG_PACKET messages from the server. This flaw allows a malicious server to send a crafted message that could lead to the client misinterpreting up to 20 bytes of memory beyond the intended buffer, potentially resulting in memory corruption or unauthorized data access. Organizations utilizing rpcap client functionality should prioritize addressing this issue to mitigate associated risks.

Public Exploit Signal

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

GitHub PoC Links

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

CVE
CVE-2026-18238
Severity
MEDIUM
CVSS
5
EPSS
0.18%

Original NVD Description

The rpcap client code that processes a RPCAP_MSG_PACKET message received from the server incorrectly validates its headers. A malicious server can send a crafted message and cause the client to treat up to 20 bytes of the client process memory beyond the end of the buffer as if it was a part of the captured packet.