What is CVE-2019-1357?

CVE-2019-1357 is a medium-severity vulnerability in Microsoft Edge, classified under Authentication Bypass by Spoofing. CVSS score: 4.3/10. Published 2019-10-10.

How severe is CVE-2019-1357?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Microsoft Edge

CVE-2019-1357

A spoofing vulnerability exists when Microsoft Browsers improperly handle browser cookies, aka 'Microsoft Browser Spoofing Vulnerability'. This CVE ID is unique from CVE-2019-0608.

Published 2019-10-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.023 (82.5th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

Microsoft Edge
Microsoft Internet Explorer — versions 10, 11
Microsoft Internet Explorer 10 — versions Windows Server 2012
Microsoft Internet Explorer 11 — versions Windows 7 for 32-bit Systems Service Pack 1, Windows 7 for x64-based Systems Service Pack 1, Windows Server 2008 R2 for x64-based Systems Service Pack 1
Microsoft Internet Explorer 11 On Windows 10 Version 1903 For 32-Bit Systems — versions unspecified
Microsoft Internet Explorer 11 On Windows 10 Version 1903 For Arm64-Based Systems — versions unspecified
Microsoft Internet Explorer 11 On Windows 10 Version 1903 For X64-Based Systems — versions unspecified
Microsoft Internet Explorer 11 On Windows Server 2012 — versions unspecified
Microsoft Edge (Edgehtml-Based) On Windows 10 Version 1803 For 32-Bit Systems — versions unspecified
Microsoft Edge (Edgehtml-Based) On Windows 10 Version 1803 For Arm64-Based Systems — versions unspecified

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

References

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1357 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2019-1357?: CVE-2019-1357 is a medium-severity vulnerability in Microsoft Edge, classified under Authentication Bypass by Spoofing. CVSS score: 4.3/10. Published 2019-10-10.
How severe is CVE-2019-1357?: Medium severity. CVSS v3 base score is 4.3 out of 10.