CVE-2020-9363

Name: CVE-2020-9363
Creator: NVD / NIST
Published: 2020-02-24T16:15:13.25+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.95%

Last modified Jun 17, 2026

CVE-2020-9363 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.95% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.95%

56.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-436

Affected Software

Vendor	Product	Versions
Sophos	Cloud Optix	< 2020-01-14
Sophos	Endpoint Protection	< 2020-01-14
Sophos	Intercept X Endpoint	< 2020-01-14
Sophos	Intercept X For Server	< 2020-01-14
Sophos	Mobile	< 2020-01-14
Sophos	Secure Web Gateway	< 2020-01-14

References

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

Timeline

Published: Feb 24, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-9363?

How severe is CVE-2020-9363?

CVE-2020-9363 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.95% probability of exploitation in the next 30 days.

How do I fix CVE-2020-9363?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-9363?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST