SEPTEMBER 17, 2026
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Case File

CVE-2026-42392

MEDIUM · CVSS 4.3 EPSS 0.23% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-28 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

An attacker with valid credentials can exploit a flaw in the IMAP URLFETCH command, leading to the disclosure of uninitialized memory in error responses, potentially exposing sensitive data. Organizations utilizing the affected IMAP functionality should prioritize addressing this vulnerability by disabling IMAP URLAUTH and updating to a secure version, as it poses a risk of data leakage. While no public exploits are currently available, the medium severity indicates that proactive measures are advisable.

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-2026-42392
Severity
MEDIUM
CVSS
4.3
EPSS
0.23%

Original NVD Description

An attacker that has valid credentials can send an invalid IMAP URLFETCH command, which causes uninitialized memory to be included in the error response returned to the client. Process memory contents can be disclosed to the client, which may include sensitive data. Disable the IMAP URLAUTH functionality. Update to non-vulnerable version. No publicly available exploits are known.