CVE-2022-1040: Sophos Firewall Authentication Bypass Vulnerability
Vulnerability summary
CVE-2022-1040 is a critical (CVSS 9.8) vulnerability in Sophos Firewall. It is known to be exploited: CISA lists it, first on 31-03-2022. EPSS estimates a 99.80% chance of exploitation in the next 30 days, higher than 99.9% of scored vulnerabilities. 2 public exploits are recorded.
Timeline
- 25-03-2022PublishedVulnerability first disclosed.
- 31-03-2022Added to CISA KEVSophos Firewall Authentication Bypass Vulnerability
- 21-04-2022CISA remediation dueApply updates per vendor instructions.
- 21-10-2025Last modifiedVulnerability information updated.
Description
An authentication bypass vulnerability in the User Portal and Webadmin allows a remote attacker to execute code in Sophos Firewall version v18.5 MR3 and older.
CVSS metrics
3 scores · 2 sources · 2 versions- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
99.80%
Chance of exploitation in the next 30 days
Percentile
100%
Versus all other CVEs
30-day change
0.00 pp
From 99.80% on 19-09-2026
Known exploited
Compare KEV catalogs
CISA KEVListed- Added
- 31-03-2022
- Federal due date
- 21-04-2022
CISA required action
Apply updates per vendor instructions. nvd.nist.gov/vuln/detail/CVE-2022-1040
Public exploits
2 foundExploit Reference (packetstormsecurity.com)
Maturity: unknown
Sophos XG115w Firewall 17.0.10 MR-10 - Authentication Bypass
Maturity: poc
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Sophos2 products
- sfos≤ 18.5.3
- sophos firewall≥ unspecified, ≤ 18.5 MR3
1 vendor · 2 products
References
4 links- www.sophos.com/en-us/security-advisories/sophos-sa-20220325-sfos-rceX Refsource CONFIRMMitigationVendor Advisory
- packetstormsecurity.com/files/168046/Sophos-XG115w-Firewall-17.0.10-MR-10-Authentication-Bypass.htmlX Refsource MISCExploitThird Party AdvisoryVDB Entry
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-1040Government ResourceUS Government Resource