PatchSiren cyber security CVE debrief
CVE-2010-0806 Microsoft CVE debrief
CVE-2010-0806 is a Microsoft Internet Explorer use-after-free vulnerability that CISA lists in its Known Exploited Vulnerabilities catalog. In the supplied corpus, it is treated as a high-severity issue and is associated with a CISA-required remediation window. Because it is in KEV, defenders should prioritize exposure reduction and apply Microsoft’s mitigation guidance as soon as possible.
- Vendor
- Microsoft
- Product
- Internet Explorer
- CVSS
- HIGH 8.8
- CISA KEV
- Listed
- Original CVE published
- 2026-05-20
- Original CVE updated
- 2026-05-20
- Advisory published
- 2026-05-20
- Advisory updated
- 2026-05-20
Who should care
Security teams, Windows and endpoint administrators, and any organization that still has Microsoft Internet Explorer enabled or available on managed systems should treat this as a priority. Asset owners who rely on legacy browser compatibility are especially important to review.
Technical summary
The supplied records identify the flaw as a use-after-free vulnerability in Microsoft Internet Explorer. CISA’s KEV entry marks it as known to be exploited and directs defenders to apply vendor mitigations, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. No additional technical exploit details were included in the provided corpus.
Defensive priority
High. The KEV listing indicates known exploitation, and the supplied due date provides a short remediation window. Organizations should prioritize affected Internet Explorer exposure over routine vulnerability work.
Recommended defensive actions
- Apply Microsoft’s vendor-recommended mitigations referenced by the KEV entry.
- If mitigations are not available or cannot be applied, discontinue use of the product where feasible.
- Review whether Internet Explorer remains enabled on endpoints, servers, or virtual desktops.
- Prioritize remediation against the KEV due date in the supplied record: 2026-06-03.
- Follow CISA BOD 22-01 guidance where it applies to cloud services and managed environments.
- Validate that any compensating controls or product retirement steps are actually in place and documented.
Evidence notes
The supplied corpus identifies the issue as a Microsoft Internet Explorer use-after-free vulnerability, with CVSS 8.8 (High), and marks it as a KEV item. The CISA entry includes dateAdded 2026-05-20, dueDate 2026-06-03, and requiredAction text directing mitigations or discontinuation if mitigations are unavailable. No additional vendor advisory text beyond the referenced URL was provided in the corpus.
Official resources
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CVE-2010-0806 CVE record
CVE.org
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CVE-2010-0806 NVD detail
NVD
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CISA Known Exploited Vulnerabilities catalog
CISA - Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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Source item URL
cisa_kev
This debrief is based only on the supplied CVE metadata, CISA KEV entry, and official links listed in the corpus. The dates in the corpus are used as record publication/modification context, not as the original vulnerability occurrence date