Vulnerability in Microsoft Internet Explorer 11

CVE-2021-26419

Scripting Engine Memory Corruption Vulnerability

EPSS: 0.341 (97.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C.

Affected products

Microsoft Internet Explorer 11 — versions 1.0.0
Microsoft Internet Explorer 9 — versions 1.0.0

Public proof-of-concept exploits

References

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26419 (x_refsource_MISC)
packetstormsecurity.com/files/162570/Internet-Explorer-jscript9.dll-Memory-Corr… (x_refsource_MISC)

Frequently asked questions

What is CVE-2021-26419?: CVE-2021-26419 is a high-severity vulnerability in Microsoft Internet Explorer 11. CVSS score: 7.5/10. Published 2021-05-11.
How severe is CVE-2021-26419?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2021-26419 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.