Buffer overflow in Microsoft Internet Explorer
CVE-2021-26419
Scripting Engine Memory Corruption Vulnerability
Vulnerability class: Buffer Overflow
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.228 (97.7th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.228 · newest: 0.228 · change: 0.000
Affected products
- Microsoft Internet Explorer — versions 11, 9
- Microsoft Internet Explorer 11 — versions 1.0.0
- Microsoft Internet Explorer 9 — versions 1.0.0
- Microsoft Windows 10 — versions 20h2, 1607, 1803
- Microsoft Windows 7
- Microsoft Windows 8.1
- Microsoft Windows Rt 8.1
- Microsoft Windows Server 2008 — versions r2
- Microsoft Windows Server 2012 — versions r2
- Microsoft Windows Server 2016
Weakness classification (CWE)
Public proof-of-concept exploits
References
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26419 (Patch, Vendor Advisory)
- packetstormsecurity.com/files/162570/Internet-Explorer-jscript9.dll-Memory-Corr… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-26419?
- CVE-2021-26419 is a high-severity vulnerability in Microsoft Internet Explorer, classified under Out-of-bounds Write. 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.