Priority LOW 22
Improper isolation in the Avast sandbox on Windows allows a local, low-privileged attacker executing inside the sandbox to access COM interfaces to the Task Scheduler service, escape containment, and execute code with el…
CVSS — · EPSS 0.0016 · Published 2026-11-06 · Fixed in 26.7 CWE-280
Priority LOW 22
Insufficient isolation in the Avast sandbox file virtualization layer on Windows allows a local, low-privileged attacker executing inside the sandbox to write arbitrary files outside sandbox containment and execute code…
CVSS — · EPSS 0.00169 · Published 2026-11-06 · Fixed in 26.7 CWE-434
Priority LOW 22
An integer underflow vulnerability in the Avast Windows Filtering Platform (WFP) stream parser on Windows allows denial of service by causing a system crash.
CVSS — · EPSS 0.00157 · Published 2026-11-06 · Fixed in 26.7 CWE-191
Priority LOW 22
Missing exception handlers in AvastSvc native message dispatcher (ashServ.dll) on Windows allow a local, unprivileged attacker to crash the service by sending specially crafted JSON messages.
CVSS — · EPSS 0.00157 · Published 2026-11-06 · Fixed in 26.7 CWE-248
Priority LOW 33
Link following vulnerability in Data Shredder components in Norton Antivirus, Avast Antivirus, and AVG Internet Security prior to 26.5.10933 on Windows allows a local, low-privileged attacker to escalate privileges to SY…
CVSS 3.1HIGH 7.3· Local · Low privileges · User interaction · EPSS 0.00124 · Published 2026-10-28 · Fixed in 26.5 CWE-59
Priority HIGH 73
Improper preservation of permissions in the Avast sandbox minifilter driver (aswSnx.sys) on Windows allows a local, low-privileged attacker executing inside the sandbox to escape file isolation and escalate to SYSTEM.
CVSS 3.1HIGH 8.8· Local · Low privileges · No interaction · EPSS 0.00157 · Published 2026-09-16 · Fixed in 26.8 CWE-281
Priority LOW 35
Link following vulnerability in the Uninstaller component in CCleaner prior to 7.10.1464 on Windows allows a local, low-privileged attacker to escalate privileges to SYSTEM via a symlink/junction created during applicati…
CVSS 3.1HIGH 7.8· Local · Low privileges · No interaction · EPSS 0.00174 · Published 2026-08-05 · Fixed in 7.10.1464 CWE-59
Priority LOW 32
Information disclosure vulnerability in Avira Password Manager when used with Mozilla Firefox may allow a remote attacker operating a cross-origin iframe to obtain credentials autofilled for the parent web page via incor…
CVSS 3.1HIGH 7.4· Network · No auth · User interaction · EPSS 0.00263 · Published 2026-06-12 · No fix listed CWE-669
Priority LOW 35
Heap buffer out-of-bounds write vulnerability in Avira Antivirus engine when scanning a malformed POSIX tar archive may allow Local Execution of Code or Denial-of-Service of the antivirus engine process.
CVSS 3.1HIGH 7.8· Local · No auth · User interaction · EPSS 0.00122 · Published 2026-06-12 · Fixed in 8.3.27.12 CWE-787
Priority LOW 35
Heap buffer out-of-bounds write vulnerability due to integer overflow in Avira Antivirus engine when scanning a malformed MS-DOS executable file may allow Local Execution of Code or Denial-of-Service of the antivirus eng…
CVSS 3.1HIGH 7.8· Local · No auth · User interaction · EPSS 0.00122 · Published 2026-06-12 · Fixed in 8.3.70.104 CWE-190
Priority LOW 35
Heap buffer out-of-bounds read vulnerability in Avira Antivirus engine when scanning a malformed PDF file may allow Local Execution of Code or Denial-of-Service of the antivirus engine process.
CVSS 3.1HIGH 7.8· Local · No auth · User interaction · EPSS 0.00122 · Published 2026-06-12 · Fixed in 8.3.70.76 CWE-125
Priority LOW 35
Heap buffer out-of-bounds read vulnerability in Avira Antivirus engine when scanning a malformed Windows PE file may allow Local Execution of Code or Denial-of-Service of the antivirus engine process.
CVSS 3.1HIGH 7.8· Local · No auth · User interaction · EPSS 0.00122 · Published 2026-06-12 · Fixed in 8.3.70.98 CWE-125
Priority LOW 24
Stack overflow vulnerability in Avast Antivirus when scanning a malformed Office Open XML file may allow Denial-of-Service of the antivirus process.
CVSS 3.1MEDIUM 5.5· Local · No auth · User interaction · EPSS 0.00113 · Published 2026-06-12 · Fixed in 25020100 CWE-121
Priority LOW 24
Null pointer dereference vulnerability in Avira Antivirus engine when scanning a malformed Windows PE file may allow Denial-of-Service of the antivirus engine process.
CVSS 3.1MEDIUM 5.5· Local · No auth · User interaction · EPSS 0.00111 · Published 2026-06-12 · Fixed in 8.3.70.64 CWE-476
Priority LOW 35
Heap buffer out-of-bounds read vulnerability in Avira Antivirus engine when scanning a malformed Windows MSI file may allow Local Execution of Code or Denial-of-Service of the antivirus engine process.
CVSS 3.1HIGH 7.8· Local · No auth · User interaction · EPSS 0.00131 · Published 2026-06-12 · Fixed in 8.3.70.56 CWE-125
Priority LOW 35
Heap out-of-bounds read vulnerability in Avast Antivirus when scanning a malformed zip file containing XML may allow Local Execution of Code or Denial-of-Service of the antivirus process.
CVSS 3.1HIGH 7.8· Local · No auth · User interaction · EPSS 0.00146 · Published 2026-06-12 · Fixed in 25021208 CWE-125
Priority LOW 24
Stack overflow vulnerability due to uncontrolled recursion in Avast Antivirus when scanning a malformed PDF file may allow Denial-of-Service of the antivirus process.
CVSS 3.1MEDIUM 5.5· Local · No auth · User interaction · EPSS 0.00113 · Published 2026-06-12 · Fixed in 25021208 CWE-674
Priority LOW 35
Heap buffer out-of-bounds read vulnerability in Avast Antivirus when scanning a malformed Windows PE file may allow Local Execution of Code or Denial-of-Service of the antivirus process.
CVSS 3.1HIGH 7.8· Local · No auth · User interaction · EPSS 0.00146 · Published 2026-06-12 · Fixed in 25021310 CWE-125
Priority LOW 35
Heap buffer out-of-bounds read vulnerability in Avast Antivirus when scanning a malformed Windows PE file with .NET metadata may allow Local Execution of Code or Denial-of-Service of the antivirus process.
CVSS 3.1HIGH 7.8· Local · No auth · User interaction · EPSS 0.00146 · Published 2026-06-12 · Fixed in 25021310 CWE-125
Priority LOW 24
Use of stack memory after free vulnerability in Avast Antivirus when scanning a malformed Windows PE file may allow Denial-of-Service of the antivirus process.
CVSS 3.1MEDIUM 5.5· Local · No auth · User interaction · EPSS 0.00111 · Published 2026-06-12 · Fixed in 25022500 CWE-590
Priority LOW 24
Uncontrolled recursion vulnerability in Avast Antivirus when scanning a malformed Windows PE file may allow Denial-of-Service of the antivirus process.
CVSS 3.1MEDIUM 5.5· Local · No auth · User interaction · EPSS 0.00111 · Published 2026-06-12 · Fixed in 25031700 CWE-674
Priority LOW 35
Heap buffer out-of-bounds write vulnerability in Avast Antivirus when scanning a malformed Windows PE file may allow Local Execution of Code or Denial-of-Service of the antivirus process.
CVSS 3.1HIGH 7.8· Local · No auth · User interaction · EPSS 0.00146 · Published 2026-06-12 · Fixed in 25040308 CWE-787
Priority LOW 35
Heap buffer out-of-bounds read vulnerability in Avira Antivirus engine when scanning a malformed PDF file may allow Local Execution of Code or Denial-of-Service of the antivirus engine process.
CVSS 3.1HIGH 7.8· Local · No auth · User interaction · EPSS 0.00131 · Published 2026-06-12 · Fixed in 8.3.70.56 CWE-125
Priority LOW 35
Heap buffer out-of-bounds read vulnerability in Avira Antivirus engine when scanning a malformed PDF file may allow Local Execution of Code or Denial-of-Service of the antivirus engine process.
CVSS 3.1HIGH 7.8· Local · No auth · User interaction · EPSS 0.00131 · Published 2026-06-12 · Fixed in 8.3.70.68 CWE-125
Priority LOW 39
A privilege escalation vulnerability exists during the installation of Norton Secure VPN via the Microsoft Store.
CVSS 3.1HIGH 8.8· Local · Low privileges · No interaction · EPSS 0.00139 · Published 2026-05-04 · No fix listed CWE-1386
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