How severe is CVE-2019-1458?

CVE-2019-1458 has a CVSS score of 7.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2019-1458?

Affected package information for CVE-2019-1458 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2019-1458?

No fixed version has been published for CVE-2019-1458 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2019-1458 actively exploited in the wild?

Yes. There are 14 known exploit references for CVE-2019-1458, including 1 documented proof-of-concept exploit on Exploit-DB and 10 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2019-1458?

CVE-2019-1458 has an EPSS (Exploit Prediction Scoring System) score of 92.2%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2019-1458 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2019-1458 (Microsoft Win32k Privilege Escalation Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2022-01-10. CISA required all US federal civilian agencies to remediate this vulnerability by 2022-07-10. The required action was: Apply updates per vendor instructions. This CVE has been used in known ransomware campaigns. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

Which products and versions are affected by CVE-2019-1458?

CVE-2019-1458 affects microsoft windows 7; microsoft windows 8.1; microsoft windows 10 1507; microsoft windows 10 1607, and 4 more product(s). Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2019-1458 published, and has it been updated?

CVE-2019-1458 was published on December 10, 2019 and was last updated on October 29, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2022-01-10 — agencies required to remediate by 2022-07-10 · Ransomware

CVE-2019-1458

HIGH

An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k Elevation of Privilege Vulnerability'.

Published

Dec 10, 2019

Updated

Oct 29, 2025

Affected

0 pkgs

Patched

None yet

Exploits

14 known

EPSS Exploitation Probability

via FIRST.org ↗

92.2%probability of exploitation in next 30 days

Very High Risk100th percentile+0.12%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k Elevation of Privilege Vulnerability'.

Affected Products

8 products · 13 configurations

windows 7microsoft

all

windows 8.1microsoft

all

windows 10 1507microsoft

all

windows 10 1607microsoft

all

windows rt 8.1microsoft

all

windows server 2008microsoft

1 version

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-48180localwindows

Microsoft Windows - 'WizardOpium' Local Privilege Escalation

by piotrflorczyk · Mar 3, 2020

Exploit-DB Source

Frequently Asked Questions

An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k Elevation of Privilege Vulnerability'.

O3 Security · Impact-Aware SCA

Is CVE-2019-1458 in your stack?

O3 detects CVE-2019-1458 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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