CVE-2017-7765

Name: CVE-2017-7765
Creator: NVD / NIST
Published: 2018-06-11T21:29:08.483+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.38%

Last modified Jun 17, 2026

CVE-2017-7765 is a vulnerability of currently unknown severity. The "Mark of the Web" was not correctly saved on Windows when files with very long names were downloaded from the Internet. Without the Mark of the Web data, the security warning that Windows displays before running executables downloaded from the Internet is not shown. EPSS estimates a 1.38% chance of exploitation in the next 30 days.

Description

The "Mark of the Web" was not correctly saved on Windows when files with very long names were downloaded from the Internet. Without the Mark of the Web data, the security warning that Windows displays before running executables downloaded from the Internet is not shown. Note: This attack only affects Windows operating systems. Other operating systems are unaffected. This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.

Metrics

EPSS Probability

1.38%

68.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 52.2.0
Mozilla	Firefox	< 54.0
Mozilla	Thunderbird	< 52.2.0

References

http://www.securityfocus.com/bid/99057Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038689Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1273265Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-15/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-16/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-17/Vendor Advisory
http://www.securityfocus.com/bid/99057Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038689Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1273265Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-15/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-16/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-17/Vendor Advisory

Timeline

Published: Jun 11, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-7765?

How severe is CVE-2017-7765?

Severity scoring for CVE-2017-7765 is pending analysis. The EPSS model estimates a 1.38% probability of exploitation in the next 30 days.

How do I fix CVE-2017-7765?

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-2017-7765?

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

Scan your code now

Source: NVD / NIST