CVE-2019-1449
CVE-2019-1449 is a critical-severity vulnerability in Microsoft Office with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 10.0
- EPSS exploit prediction: 6% (93rd percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Microsoft Office
- Published:
- Last modified:
Description
A security feature bypass vulnerability exists in the way that Office Click-to-Run (C2R) components handle a specially crafted file, which could lead to a standard user, any AppContainer sandbox, and Office LPAC Protected View to escalate privileges to SYSTEM.To exploit this bug, an attacker would have to run a specially crafted file, aka 'Microsoft Office ClickToRun Security Feature Bypass Vulnerability'.
Frequently asked questions
- What is CVE-2019-1449?
- A security feature bypass vulnerability exists in the way that Office Click-to-Run (C2R) components handle a specially crafted file, which could lead to a standard user, any AppContainer sandbox, and Office LPAC Protected View to escalate privileges to SYSTEM.To exploit this bug, an attacker would have to run a specially crafted file, aka 'Microsoft Office ClickToRun Security Feature Bypass Vulnerability'.
- How severe is CVE-2019-1449?
- CVE-2019-1449 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2019-1449 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2019-1449?
- CVE-2019-1449 primarily affects Microsoft Office. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2019-1449?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2019-1449 published?
- CVE-2019-1449 was published on 2019-11-12 and last updated on 2026-06-17.
References
Affected products (2)
- cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:office_365_proplus:-:*:*:*:*:*:*:*
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