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CVE-2010-0491
Use-after-free vulnerability in Microsoft Internet Explorer 5.01 SP4, 6, and 6 SP1 allows remote attackers to execute arbitrary code by…
- 9.3HighCVSS base score
- 29.3%Exploitation in 30 daysEPSS · top 1.8% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Use-after-free vulnerability in Microsoft Internet Explorer 5.01 SP4, 6, and 6 SP1 allows remote attackers to execute arbitrary code by changing unspecified properties of an HTML object that has an onreadystatechange event handler, aka "HTML Object Memory Corruption Vulnerability."
Timeline
ID reserved
By microsoft
- 57 days later
· 57 days later
Published
- 14 years later
· 14 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 |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C |
- EPSS (exploitation in 30 days)
- 29.3% · top 1.8% of all CVEs (10 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 9.3.
Affected products
n/a
- affected n/a
References
8
- oval:org.mitre.oval:def:8421 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- 39027 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- TA10-089A (opens in a new tab)third-party-advisoryx_refsource_CERTx_transferred
- TA10-068A (opens in a new tab)third-party-advisoryx_refsource_CERTx_transferred
- MS10-018 (opens in a new tab)vendor-advisoryx_refsource_MSx_transferred
- 20100330 Microsoft Internet Explorer 'onreadystatechange' Use After Free Vulnerability (opens in a new tab)third-party-advisoryx_refsource_IDEFENSEx_transferred
- ADV-2010-0744 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 1023773 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_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-2010-0522 (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-2010-0491)Record last updated .