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CVE-2021-26419Scripting Engine Memory Corruption Vulnerability
- 7.5HighCVSS base score
- 22.8%Exploitation in 30 daysEPSS · top 2.2% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Scripting Engine Memory Corruption Vulnerability
Timeline
ID reserved
By microsoft
- 3 months later
· 3 months later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| microsoftCNA (assigner) | 3.1 | High7.5 | 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 |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 22.8% · top 2.2% of all CVEs (13 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
Microsoft · Internet Explorer 11
- affected 1.0.0 – < 10.0.14393.4401
- affected 1.0.0 – < 10.0.17134.2207
- affected 1.0.0 – < 10.0.17763.1935
- affected 1.0.0 – < 10.0.18363.1556
- affected 1.0.0 – < 10.0.19041.982
- affected 1.0.0 – < 10.0.10240.18931
- affected 1.0.0 – < 6.1.7601.24597
- affected 1.0.0 – < 6.1
- affected 1.0.0 – < 6.3.9600.20017
- affected 1.0.0 – < 6.3.9600.20016
- affected 1.0.0 – < 6.2.9200.23347
- affected 1.0.0 – < 6.2
Microsoft · Internet Explorer 9
- affected 1.0.0 – < 6.0.6003.21117
- affected 1.0.0 – < 6.0
References
References2
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26419 (opens in a new tab)x_refsource_MISCx_transferred
- http://packetstormsecurity.com/files/162570/Internet-Explorer-jscript9.dll-Memory-Corruption.html (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2021-13225 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2021-26419)Record last updated .