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Fencer Intel
high 8.8

CVE-2014-0322 kev in the critical feed json

Use-after-free vulnerability in Microsoft Internet Explorer 9 and 10 allows remote attackers to execute arbitrary code via vectors involvin…

published 2014-02-14 12 y ago modified 2026-06-17 4 mo ago also EUVD-2014-0360

cvss
8.8
version 3.1, CNA
cisa kev
Exploited
added 2022-05-04
epss
85.1%
EPSS 85.1% chance of exploitation in 30 days, percentile 99.7%
public exploits
3
Metasploit, Exploit-DB

Summary

Use-after-free vulnerability in Microsoft Internet Explorer 9 and 10 allows remote attackers to execute arbitrary code via vectors involving crafted JavaScript code, CMarkup, and the onpropertychange attribute of a script element, as exploited in the wild in January and February 2014.

Patch / fix

cisa required action Apply updates per vendor instructions.

Timeline

  1. First public exploit (Metasploit exploit/windows/browser/ms14_012_cmarkup_uaf)
  2. Published
  3. Added to CISA KEV
  4. CISA patch deadline
  5. CISA SSVC: exploitation active

Known exploited

Added
4 y ago
Patch by
2022-05-25 (4 y ago)
Ransomware
Not known
Required action
Apply updates per vendor instructions.
Vendor, product
Microsoft, Internet Explorer
CISA name
Microsoft Internet Explorer Use-After-Free Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
no
Technical impact
total
Assessed
20 mo ago

Exploit prediction

85.12% chance of exploitation in the next 30 days, higher than 99.7% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • Metasploit exploit/windows/browser/ms14_012_cmarkup_uaf MS14-012 Microsoft Internet Explorer CMarkup Use-After-Free metasploit exploit, normal rank, 2014-02-13
  • EDB-32904 Microsoft Internet Explorer - CMarkup Use-After-Free (MS14-012) (Metasploit) remote, 2014-04-16
  • EDB-32851 Microsoft Internet Explorer 10 - CMarkup Use-After-Free (MS14-012) remote, 2014-04-14
  • dropbox.com https://www.dropbox.com/s/pyxjgycmudirbqe/CVE-2014-0322.zip referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.