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PatchSiren cyber security CVE debrief

CVE-2022-1040 Sophos CVE debrief

CVE-2022-1040 is an authentication bypass vulnerability in Sophos Firewall that CISA added to its Known Exploited Vulnerabilities catalog on 2022-03-31. Because it is confirmed exploited, organizations using Sophos Firewall should treat remediation as urgent and follow the vendor’s update instructions without delay.

Vendor
Sophos
Product
Firewall
CVSS
CRITICAL 9.8
CISA KEV
Listed
Original CVE published
2022-03-31
Original CVE updated
2022-03-31
Advisory published
2022-03-31
Advisory updated
2022-03-31

Who should care

Security teams, firewall administrators, and incident response teams responsible for Sophos Firewall deployments should prioritize this CVE, especially where systems are externally reachable or support critical network access.

Technical summary

The official records identify CVE-2022-1040 as a Sophos Firewall authentication bypass vulnerability. CISA’s KEV entry confirms known exploitation and directs affected users to apply updates per vendor instructions. The supplied corpus does not include additional technical detail such as affected versions or exploit conditions.

Defensive priority

Urgent. This is a CISA KEV-listed vulnerability with a due date of 2022-04-21 in the supplied timeline context, so remediation should be prioritized immediately.

Recommended defensive actions

  • Apply Sophos vendor updates and follow the vendor’s remediation instructions for all affected Firewall deployments.
  • Inventory all Sophos Firewall assets to confirm which systems are exposed and which have been remediated.
  • Verify that remediation completed successfully by checking software versions and configuration status.
  • Prioritize confirmation and remediation for any devices that provide critical or externally reachable network access.
  • Track this CVE alongside other KEV-listed items until all affected systems are fully addressed.

Evidence notes

This debrief is based only on the supplied CISA KEV feed item and the official CVE/NVD references linked in the corpus. The source corpus confirms the vulnerability name, vendor/product, KEV status, publication date, and due date, but does not include vendor advisory text, affected-version scope, or other technical specifics, so those details are not inferred.

Sources and references

Verified primary and authoritative sources

  • CVE-2022-1040 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2022-1040

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2022-1040 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2022-1040

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.first.org/epss/

    first_epss

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.