High severity7.5NVD Advisory· Published May 27, 2025· Updated Apr 13, 2026
CVE-2025-5270
CVE-2025-5270
Description
In certain cases, SNI could have been sent unencrypted even when encrypted DNS was enabled. This vulnerability was fixed in Firefox 139 and Thunderbird 139.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
7cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*range: <139.0
- (no CPE)range: <139
- Range: <139
- osv-coords4 versionspkg:apk/chainguard/firefoxpkg:apk/chainguard/firefox-esrpkg:apk/wolfi/firefoxpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweed
< 139-r0+ 3 more
- (no CPE)range: < 139-r0
- (no CPE)range: < 140.5.0-r0
- (no CPE)range: < 139-r0
- (no CPE)range: < 139.0.1-1.1
Patches
Vulnerability mechanics
References
3- www.mozilla.org/security/advisories/mfsa2025-42/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdPermissions Required
- www.mozilla.org/security/advisories/mfsa2025-45/nvd
News mentions
0No linked articles in our index yet.