CVE-2022-3236: Sophos Firewall Code Injection Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 23 Sep 2022, the same day the CVE record was published.
- How likely is exploitation in the next 30 days?
- 98.9%
EPSS score, percentile 99.9 of all scored records
- How severe?
- 9.8 Critical
CVSS v3.1 base score, given by the CNA
- What should I do?
Required action (CISA), due 14 Oct 2022: Apply updates per vendor instructions.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected: 18.5 MR4 and earlier; 19.0 MR1 and earlier
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
What to do
Required action, set by CISA
Apply updates per vendor instructions.
CISA due date for this action: 14 October 2022.
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
Linked from CISA's catalog entry
- https://www.sophos.com/en-us/security-advisories/sophos-sa-20220923-sfos-rce
- https://nvd.nist.gov/vuln/detail/CVE-2022-3236
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | 18.5 MR4 and earlier |
| Affected | 19.0 MR1 and earlier |
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
About this vulnerability
A code injection vulnerability in the User Portal and Webadmin of Sophos Firewall allows for remote code execution.
Summary: CISA's KEV catalog, as of 28 Oct 2026.
- CISA added CVE-2022-3236 to its Known Exploited Vulnerabilities (KEV) catalog on 23 Sep 2022.
- CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
- The due date CISA sets for the required action is 14 Oct 2022.
- The CVE record was published on 23 Sep 2022, the same day it was added to KEV.
- The CVE record carries a CVSS v3.1 base score of 9.8 (Critical), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 98.9% (percentile 99.9), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.
Description
A code injection vulnerability in the User Portal and Webadmin allows a remote attacker to execute code in Sophos Firewall version v19.0 MR1 and older.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
Weakness
- CWE-94: Improper Control of Generation of Code ('Code Injection')
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| 23 Sep 2022 | CVE record published |
| 23 Sep 2022 | Added to CISA KEV |
| 14 Oct 2022 | CISA due date for the required action |
| 7 Oct 2026 | CVE record last updated |
References
More exploited Sophos vulnerabilities
- CVE-2020-15069: Sophos XG Firewall Buffer Overflow Vulnerability
- CVE-2020-29574: CyberoamOS (CROS) SQL Injection Vulnerability
- CVE-2023-1671: Sophos Web Appliance Command Injection Vulnerability
- CVE-2022-1040: Sophos Firewall Authentication Bypass Vulnerability
- CVE-2020-25223: Sophos SG UTM Remote Code Execution Vulnerability
- CVE-2020-12271: Sophos SFOS SQL Injection Vulnerability