CVE-2019-1148

MEDIUM

Microsoft Windows Graphics Component - Info Disclosure

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2019-1148. PoCs published by Google Security Research.

AI-analyzed exploit summary The exploit demonstrates a crash in Microsoft Font Subsetting DLL (fontsub.dll) due to a negative index into the glyph ID array, leading to an access violation. The PoC includes malformed font files that trigger the vulnerability, potentially allowing sensitive data disclosure from the process heap.

Description

An information disclosure vulnerability exists when the Microsoft Windows Graphics Component improperly handles objects in memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the user’s system. To exploit this vulnerability, an attacker would have to log on to an affected system and run a specially crafted application. The update addresses the vulnerability by correcting the way in which the Windows Graphics Component handles objects in memory.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · textdoswindows
https://www.exploit-db.com/exploits/47262

The exploit demonstrates a crash in Microsoft Font Subsetting DLL (fontsub.dll) due to a negative index into the glyph ID array, leading to an access violation. The PoC includes malformed font files that trigger the vulnerability, potentially allowing sensitive data disclosure from the process heap.

Classification
Working Poc 90%
Attack Type
Dos | Info Leak
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Windows 10 1709 (fontsub.dll)
No auth needed
Prerequisites: Malformed font file · Access to target system to process the font file
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2

Scores

CVSS v3 5.5
EPSS 0.0283
EPSS Percentile 84.9%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-125
Status published
Products (19)
microsoft/office 2019
microsoft/windows_10
microsoft/windows_10 1607
microsoft/windows_10 1703
microsoft/windows_10 1709
microsoft/windows_10 1803
microsoft/windows_10 1809
microsoft/windows_10 1903
microsoft/windows_7
microsoft/windows_8.1
... and 9 more
Published Aug 14, 2019
Tracked Since Feb 18, 2026