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Case File

CVE-2021-31800

CRITICAL · CVSS 9.8 EPSS 19.26% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-05-05 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.8. Public exploit code or proof-of-concept references have been detected in its references. Its EPSS score suggests a 19.3% probability of exploitation in the next 30 days.

Public Exploit Signal

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

Detected Signals
arbitrary code execution code execution

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

CVE
CVE-2021-31800
Severity
CRITICAL
CVSS
9.8
EPSS
19.26%

Original NVD Description

Multiple path traversal vulnerabilities exist in smbserver.py in Impacket through 0.9.22. An attacker that connects to a running smbserver instance can list and write to arbitrary files via ../ directory traversal. This could potentially be abused to achieve arbitrary code execution by replacing /etc/shadow or an SSH authorized key.

Related CVEs

Other vulnerabilities affecting the same vendor(s)