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Vulnerability record · CVE-2020-9363 · published 24 February 2020

CVE-2020-9363: Sophos cloud optix interpretation conflict vulnerability

Sophos · Cloud Optix

The Sophos AV parsing engine before 2020-01-14 allows virus-detection bypass via a crafted ZIP archive. This affects Endpoint Protection, Cloud Optix, Mobile, Intercept X Endpoint, Intercept X for Server, and Secure Web Gateway. NOTE: the vendor feels that this does not apply to endpoint-protection products because the virus would be detected upon extraction.

7.8 CVSS 3.1 High EPSS 0.97% · top 39.6% CWE-436 · Interpretation conflict
7.8CVSS 3.1 base score, v2 6.8
0.97%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

The Sophos AV parsing engine before 2020-01-14 allows virus-detection bypass via a crafted ZIP archive. This affects Endpoint Protection, Cloud Optix, Mobile, Intercept X Endpoint, Intercept X for Server, and Secure Web Gateway. NOTE: the vendor feels that this does not apply to endpoint-protection products because the virus would be detected upon extraction.

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

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://blog.zoller.lu/p/release-mode-coordinated-disclosure-ref.html Third Party Advisory
https://community.sophos.com/b/security-blog/posts/sophos-comments-to-cve-2020-9363 Vendor Advisory
https://blog.zoller.lu/p/release-mode-coordinated-disclosure-ref.html Third Party Advisory
https://community.sophos.com/b/security-blog/posts/sophos-comments-to-cve-2020-9363 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-9363), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.