CVE-2021-34448
Microsoft Windows Scripting Engine Memory Corruption Vulnerability
CVSS
6.8
Medium
EPSS
40.1%
p99
KEV
YES
Nov 3, 2021
Exploit Today
80
0-100
Published: Jul 16, 2021 · Last modified: Aug 10, 2026 · CWE-787
30.7%EPSS · 30 days40.1%
2026-08-022026-08-31
Product
Microsoft / Windows
Vulnerability
Microsoft Windows Scripting Engine Memory Corruption Vulnerability
Added to KEV
Nov 3, 2021
Remediate by
Nov 17, 2021
Known ransomware use
No
Summary description
Microsoft Windows Scripting Engine contains an unspecified vulnerability that allows for memory corruption.
Required action
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2021-34448
Scripting Engine Memory Corruption Vulnerability
CVECVSSEPSSKEVRExploitTitleMod.
CVE-2026-826808.8 HIG—
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——1CVE-2025-40843 https://github.com/advisories/GHSA-5xf2-f6ch-6p8r was fixed by replacing unchecked strcpy() with a bounded safe_strcpy() helper.
At ldlogger-tool-gcc.c:129 the destination passed to that helper is fullPath + 2, but the size
passed down is the full PATH_MAX. safe_strcpy() is strncpy(), which NUL-pads the
destination out to the whole n, so this site writes 4096 bytes into the 4094 that remain — a
2-byte stack overflow on every invocation, independent of the input path's length.
This issue affects CodeChecker: through 6.28.2.3dCVE-2026-183935.4 MED16.8%
——5A flaw was found in FFmpeg. The tdsc_load_cursor() function writes beyond
the bounds of a heap-allocated buffer when processing crafted TDSC cursor
data. A remote attacker could exploit this by supplying a specially crafted
video file, potentially leading to a denial of service or arbitrary code
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——7An integer underflow vulnerability in the WatchGuard Fireware OS iked process allows a remote unauthenticated attacker to create a Denial of Service (DoS) condition in VPN processing by sending specially crafted network traffic.3dCVE-2026-78010—25.2%
——8A stack-based buffer overflow vulnerability in the WatchGuard Fireware OS iked process iallows a remote unauthenticated attacker to create a Denial of Service (DoS) condition in VPN processing by sending specially crafted network traffic.3dCVE-2026-78008—23.2%
——7A buffer overflow vulnerability in the WatchGuard Fireware OS Management Web UI allows an authenticated administrator with network access to cause a denial of service (DoS) condition or potentially execute arbitrary code by sending specially crafted network traffic.3d