CVE catalog

CVE-2018-5174

firefox-esr: CVE-2018-5174

Severity: High · CVSS 7.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published: May 16, 2018, 7:36:01 PM UTC
Source: [NVD] · [CVE record]
EPSS: 1.81% · Oct 25, 2026

In the Windows 10 April 2018 Update, Windows Defender SmartScreen honors the "SEE_MASK_FLAG_NO_UI" flag associated with downloaded files and will not show any UI. Files that are unknown and potentially dangerous will be allowed to run because SmartScreen will not prompt the user for a decision, and if the user is offline all files will be allowed to be opened because Windows won't prompt the user to ask what to do. Firefox incorrectly sets this flag when downloading files, leading to less secure behavior from SmartScreen. Note: this issue only affects Windows 10 users running the April 2018 update or later. It does not affect other Windows users or other operating systems. This vulnerability affects Thunderbird < 52.8, Thunderbird ESR < 52.8, Firefox < 60, and Firefox ESR < 52.8.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	firefox-esr	sid	`153.5.1esr-1`	not affected
Debian	firefox-esr	forky	`153.5.1esr-1`	not affected
Debian	firefox-esr	trixie	`140.15.0esr-1~deb13u1`	not affected
Debian	firefox-esr	trixie-security	`153.5.1esr-1~deb13u1`	not affected
Debian	firefox-esr	bookworm	`140.12.0esr-1~deb12u1`	not affected
Debian	firefox-esr	bookworm-security	`153.5.1esr-1~deb12u1`	not affected
Debian	thunderbird	sid	`1:153.5.1esr-1`	not affected
Debian	thunderbird	forky	`1:153.5.0esr-1`	not affected
Debian	thunderbird	trixie	`1:140.12.0esr-1~deb13u1`	not affected
Debian	thunderbird	trixie-security	`1:153.5.1esr-1~deb13u2`	not affected
Debian	thunderbird	bookworm	`1:140.12.0esr-1~deb12u1`	not affected
Debian	thunderbird	bookworm-security	`1:153.5.1esr-1~deb12u1`	not affected

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	firefox-esr	source	sid	`Not affected`	unimportant	Not reported	Not reported
Debian	firefox-esr	source	forky	`Not affected`	unimportant	Not reported	Not reported
Debian	firefox-esr	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	firefox-esr	source	bookworm	`Not affected`	unimportant	Not reported	Not reported
Debian	thunderbird	source	sid	`Not affected`	unimportant	Not reported	Not reported
Debian	thunderbird	source	forky	`Not affected`	unimportant	Not reported	Not reported
Debian	thunderbird	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	thunderbird	source	bookworm	`Not affected`	unimportant	Not reported	Not reported

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[firefox-esr]Unknown
Details (4)
- 140.12.0esr-1~deb12u1 · amd64 · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.12.0esr-1~deb12u1 · arm64 · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · amd64 · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · arm64 · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
[firefox-esr-l10n-ach]Unknown
Source package: [firefox-esr]
Details (4)
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
[firefox-esr-l10n-af]Unknown
Source package: [firefox-esr]
Details (4)
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
[firefox-esr-l10n-all]Unknown
Source package: [firefox-esr]
Details (4)
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
[firefox-esr-l10n-an]Unknown
Source package: [firefox-esr]
Details (4)
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
[firefox-esr-l10n-ar]Unknown
Source package: [firefox-esr]
Details (4)
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
[firefox-esr-l10n-ast]Unknown
Source package: [firefox-esr]
Details (4)
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
[firefox-esr-l10n-az]Unknown
Source package: [firefox-esr]
Details (4)
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
[firefox-esr-l10n-be]Unknown
Source package: [firefox-esr]
Details (4)
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
[firefox-esr-l10n-bg]Unknown
Source package: [firefox-esr]
Details (4)
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
[firefox-esr-l10n-bn]Unknown
Source package: [firefox-esr]
Details (4)
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
[firefox-esr-l10n-br]Unknown
Source package: [firefox-esr]
Details (4)
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
[firefox-esr-l10n-bs]Unknown
Source package: [firefox-esr]
Details (4)
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
[firefox-esr-l10n-ca]Unknown
Source package: [firefox-esr]
Details (4)
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
[firefox-esr-l10n-cak]Unknown
Source package: [firefox-esr]
Details (4)
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
[firefox-esr-l10n-ca-valencia]Unknown
Source package: [firefox-esr]
Details (4)
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
[firefox-esr-l10n-cs]Unknown
Source package: [firefox-esr]
Details (4)
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
[firefox-esr-l10n-cy]Unknown
Source package: [firefox-esr]
Details (4)
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
[firefox-esr-l10n-da]Unknown
Source package: [firefox-esr]
Details (4)
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
[firefox-esr-l10n-de]Unknown
Source package: [firefox-esr]
Details (4)
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.12.0esr-1~deb12u1 · all · bookworm
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm
- 140.14.0esr-1~deb12u1 · all · bookworm-security
  Not affected
  dsa · firefox-esr · debian · bookworm

Next results

Observed: Oct 27, 2026, 3:32:03 AM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [SUSE security advisories and VEX]