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CVE-2017-7765

The "Mark of the Web" was not correctly saved on Windows when files with very long names were downloaded from the Internet. Without the…

High7.5EPSS 1.3%
Published
Updated
Reserved
Assigned by
mozilla

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.

Scores

CVSS scores of CVE-2017-7765, by who scored it
Scored byCVSSScoreVector
NVDNVD · Modified3.0High7.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS (exploitation in 30 days)
1.3% · top 29% of all CVEs (2 Nov 2026)

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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

Affected products

  • Mozilla · Firefox

    • affected unspecified – < 54

  • Mozilla · Firefox ESR

    • affected unspecified – < 52.2

  • Mozilla · Thunderbird

    • affected unspecified – < 52.2

References (6)

Sources

The same CVE in the primary databases and aggregators, to check against.

Record last updated .