Use-after-free vulnerability in Microsoft Internet Explorer 9 and 10 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to an object that (1) was not properly initialized or (2) is deleted, aka "Improper Ref Counting Use After Free Vulnerability."
Published Dec 12, 2012
9.0
CRITICALCVSS 3.1
EPSS 17.57%
Description
Use-after-free vulnerability in Microsoft Internet Explorer 9 and 10 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to an object that (1) was not properly initialized or (2) is deleted, aka "Improper Ref Counting Use After Free Vulnerability."
Affected products
No data.
Configuration 1
- 9
Running on/with
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
Configuration 2
- 10
Running on/with
- n/a
- n/a
- n/a
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Jan 10, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (18 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 17.57% (0.17572) | 97.06th | v5 (v2026.06.15) |
| Jun 15, 2026 | 17.57% (0.17572) | 96.75th | v5 (v2026.06.15) |
| May 19, 2026 | 37.96% (0.37960) | 97.27th | v4 (v2025.03.14) |
| Mar 30, 2025 | 36.18% (0.36178) | 96.78th | v4 (v2025.03.14) |
| Mar 29, 2025 | 42.58% (0.42583) | 96.21th | v4 (v2025.03.14) |
| Mar 19, 2025 | 36.18% (0.36178) | 96.62th | v4 (v2025.03.14) |
| Mar 17, 2025 | 38.82% (0.38816) | 96.92th | v4 (v2025.03.14) |
| Dec 17, 2024 | 93.31% (0.93312) | 99.30th | v3 (v2023.03.01) |
| Dec 12, 2024 | 89.57% (0.89573) | 98.89th | v3 (v2023.03.01) |
| Sep 10, 2024 | 88.69% (0.88692) | 98.79th | v3 (v2023.03.01) |
| Jan 5, 2024 | 92.40% (0.92401) | 98.78th | v3 (v2023.03.01) |
| Nov 1, 2023 | 91.56% (0.91557) | 98.58th | v3 (v2023.03.01) |
| Jun 29, 2023 | 90.76% (0.90760) | 98.37th | v3 (v2023.03.01) |
| May 6, 2023 | 90.66% (0.90662) | 98.30th | v3 (v2023.03.01) |
| Mar 17, 2023 | 90.17% (0.90167) | 98.19th | v3 (v2023.03.01) |
| Mar 7, 2023 | 91.00% (0.90999) | 98.24th | v3 (v2023.03.01) |
| Mar 6, 2023 | 39.35% (0.39349) | 98.12th | v2 (v2022.01.01) |
| Feb 4, 2022 | 39.35% (0.39349) | 97.38th | v2 (v2022.01.01) |
References (3)
- http://www.us-cert.gov/cas/techalerts/TA12-346A.html third-party-advisoryx_refsource_CERTUS Government Resource
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-077 vendor-advisoryx_refsource_MS
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16211 vdb-entrysignaturex_refsource_OVAL
| Link | Providers | Tags |
|---|---|---|
| http://www.us-cert.gov/cas/techalerts/TA12-346A.html | third-party-advisoryx_refsource_CERTUS Government Resource | |
| https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-077 | vendor-advisoryx_refsource_MS | |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16211 | vdb-entrysignaturex_refsource_OVAL |
Change history (0)
No recorded changes yet.