CVE-2019-11745

HighCVSS 8.8/10Last modified Jun 17, 2026

Description

When encrypting with a block cipher, if a call to NSC_EncryptUpdate was made with data smaller than the block size, a small out of bounds write could occur. This could have caused heap corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-787

Affected software

VendorProductVersions
MozillaThunderbirdbefore 68.3
MozillaFirefox ESRbefore 68.3
MozillaFirefoxbefore 71

References

Timeline

Published
Jan 8, 2020
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2019-11745: High severity, CVSS 8.8 | Vulnix