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CVE-2023-1671

98
FAUCET Score

CVE-2023-1671 is a critical pre-authentication command injection vulnerability (CWE-77) affecting Sophos Web Appliance versions older than 4.3.10.4, allowing for arbitrary code execution. With a CVSS score of 9.8, this flaw is easily exploitable over the network without authentication, leading to complete compromise of confidentiality, integrity, and availability. This vulnerability is actively exploited in the wild, listed in CISA's KEV catalog, and has publicly available exploit code, including an ExploitDB entry and Nuclei templates, garnering significant community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.3.10.4CPE matchmatch criteria
cpe:2.3:a:sophos:web_appliance:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
100.00%
Probability of exploitation in next 30 days
EPSS Percentile
100.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Added to KEV · Nov 16, 2023
Nuclei: CVE-2023-1671 · Apr 27, 2023
ExploitDB: EDB-51396 · Apr 25, 2023
This CVE's current EPSS score of 1.0000 is in the 100th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
packetstormsecurity.com / files/172016/Sophos-Web-Appliance-4.3.10.4-Command-Injection.html
ExploitThird Party AdvisoryVDB Entry
sophos.com / en-us/security-advisories/sophos-sa-20230404-swa-rce
Vendor Advisory