CVE-2023-1671

CRITICAL9.8

CISA KEV

Published 2023-04-04 · Updated 2026-06-17 · Source security-alert@sophos.com

Summary

CVE-2023-1671 is a critical-severity (CVSS 9.8) vulnerability in Sophos Web Appliance. CISA added it to the Known Exploited Vulnerabilities catalog on November 16, 2023, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by December 7, 2023. CISA does not currently list it as used in ransomware campaigns. Sophos has 7 vulnerabilities in the KEV catalog, 2 of them linked to ransomware.

All 7 known-exploited Sophos vulnerabilities →

Description

A pre-auth command injection vulnerability in the warn-proceed handler of Sophos Web Appliance older than version 4.3.10.4 allows execution of arbitrary code.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-77CWE-77

CISA Known-Exploited Vulnerability

Product: Sophos — Web Appliance

Name: Sophos Web Appliance Command Injection Vulnerability

Date added: 2023-11-16 · Due: 2023-12-07

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

References

View on NVD

More exploited Sophos vulnerabilities

Most recently added to CISA KEV

CVE-2020-15069
XG Firewall — Sophos XG Firewall Buffer Overflow Vulnerability
added 2025-02-06
CVE-2020-29574
RANSOMWARE
CyberoamOS — CyberoamOS (CROS) SQL Injection Vulnerability
added 2025-02-06
CVE-2022-3236
Firewall — Sophos Firewall Code Injection Vulnerability
added 2022-09-23
CVE-2022-1040
Firewall — Sophos Firewall Authentication Bypass Vulnerability
added 2022-03-31
CVE-2020-25223
SG UTM — Sophos SG UTM Remote Code Execution Vulnerability
added 2022-03-25
CVE-2020-12271
RANSOMWARE
SFOS — Sophos SFOS SQL Injection Vulnerability
added 2021-11-03

View all →

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