CVE-2014-1776

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2022-01-28. Federal remediation due 2022-07-28.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

82.68% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 99.6% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2014-04-27 10:00Z12 YR AGO

Last updated

2025-10-22 00:05Z1 YR AGO

Reserved

2014-01-29

Assigning CNA

microsoft

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

• CWE-416Use After FreeVariant

Data version

5.1

Document digest

39622ec3fb98d3199ff91db639a1ecb9b7999a4a6b22e6964b251514e2cd2aa4

• securitytracker.com1030154http://securitytracker.com/id?1030154vdb-entryx_refsource_SECTRACK
• www.osvdb.org106311http://www.osvdb.org/106311vdb-entryx_refsource_OSVDB
• docs.microsoft.comMS14-021https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-021vendor-advisoryx_refsource_MS
• blogs.technet.comhttp://blogs.technet.com/b/srd/archive/2014/04/30/protection-strategies-for-the-security-advisory-2963983-ie-0day.aspxx_refsource_CONFIRM
• secunia.com57908http://secunia.com/advisories/57908third-party-advisoryx_refsource_SECUNIA
• www.signalsec.comhttp://www.signalsec.com/cve-2014-1776-ie-0day-analysis/x_refsource_MISC
• www.fireeye.comhttp://www.fireeye.com/blog/uncategorized/2014/04/new-zero-day-exploit-targeting-internet-explorer-versions-9-through-11-identified-in-targeted-attacks.htmlx_refsource_MISC
• www.kb.cert.orgVU#222929http://www.kb.cert.org/vuls/id/222929third-party-advisoryx_refsource_CERT-VN
• technet.microsoft.comhttps://technet.microsoft.com/library/security/2963983x_refsource_CONFIRM
• www.securityfocus.com67075http://www.securityfocus.com/bid/67075vdb-entryx_refsource_BID
• www.vicarius.iohttps://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-mitigation-scripts
• www.vicarius.iohttps://www.vicarius.io/vsociety/posts/cve-2014-1776-use-after-free-vulnerability-in-microsoft-internet-explorer-detection-script
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-1776government-resource