CAT-QuickHeal 10.00 and possibly 9.50, when Internet Explorer 6 or 7 is used, allows remote attackers to bypass detection of malware in an HTML document by placing an MZ header (aka "EXE info") at the beginning, and modifying the filename to have (1) no extension, (2) a .txt extension, or (3) a .jpg extension, as demonstrated by a document containing a CVE-2006-5745 exploit.

Quick Heal AntiVirus Plus 2009 10.00 SP1 and Quick Heal Total Security 2009 10.00 SP1 use weak permissions (Everyone: Full Control) for the product files, which allows local users to gain privileges by replacing executables with Trojan horse programs, as demonstrated by replacing quhlpsvc.exe.

A vulnerability exists in Quick Heal Total Security 23.0.0 in the quarantine management component where insufficient validation of restore paths and improper permission handling allow a low-privileged local user to restore quarantined files into protected system directories. This behavior can be abused by a local attacker to place files in high-privilege locations, potentially leading to privilege escalation.

The webssx.sys driver in QuickHeal 16.00 allows remote attackers to cause a denial of service.

Quick Heal Internet Security 10.1.0.316, Quick Heal Total Security 10.1.0.316, and Quick Heal AntiVirus Pro 10.1.0.316 are vulnerable to Out of Bounds Write on a Heap Buffer due to improper validation of dwCompressionSize of Microsoft WIM Header WIMHEADER_V1_PACKED. This vulnerability can be exploited to gain Remote Code Execution as well as Privilege Escalation.

Quick Heal Internet Security 10.1.0.316, Quick Heal Total Security 10.1.0.316, and Quick Heal AntiVirus Pro 10.1.0.316 are vulnerable to Memory Corruption while parsing a malformed Mach-O file.

Quick Heal Internet Security 10.1.0.316, Quick Heal Total Security 10.1.0.316, and Quick Heal AntiVirus Pro 10.1.0.316 are vulnerable to Memory Corruption while parsing a malformed Mach-O file.

Quick Heal Internet Security 10.1.0.316, Quick Heal Total Security 10.1.0.316, and Quick Heal AntiVirus Pro 10.1.0.316 have approximately 165 PE files in the default installation that do not use ASLR/DEP protection mechanisms that provide sufficient defense against directed attacks against the product.

Stack-based buffer overflow in Quick Heal Internet Security 10.1.0.316 and earlier, Total Security 10.1.0.316 and earlier, and AntiVirus Pro 10.1.0.316 and earlier on OS X allows remote attackers to execute arbitrary code via a crafted LC_UNIXTHREAD.cmdsize field in a Mach-O file that is mishandled during a Security Scan (aka Custom Scan) operation.

Stack-based buffer overflow in pepoly.dll in Quick Heal AntiVirus Pro 7.0.0.1 allows local users to execute arbitrary code or cause a denial of service (process crash) via a long *.text value in a PE file.

DLL Hijacking Vulnerability in Quick Heal Total Security

A DLL hijacking vulnerability in the installed for Quick Heal Total Security prior to 12.1.1.27 allows a local attacker to achieve privilege escalation, leading to execution of arbitrary code, via the installer not restricting the search path for required DLLs and then not verifying the signature of the DLLs it tries to load.

TOCTOU Vulnerability in Quick Heal Total Security

Time of Check - Time of Use (TOCTOU) vulnerability in Quick Heal Total Security prior to 12.1.1.27 allows a local attacker to achieve privilege escalation, potentially leading to deletion of system files. This is achieved through exploiting the time between detecting a file as malicious and when the action of quarantining or cleaning is performed, and using the time to replace the malicious file by a symlink.

The Quick Heal AV parsing engine (November 2019) allows virus-detection bypass via a crafted GPFLAG in a ZIP archive. This affects Total Security, Home Security, Total Security Multi-Device, Internet Security, Total Security for Mac, AntiVirus Pro, AntiVirus for Server, and Total Security for Android.

Quick Heal Total Security before 19.0 allows attackers with local admin rights to obtain access to files in the File Vault via a brute-force attack on the password.

Quick Heal Total Security before version 19.0 transmits quarantine and sysinfo files via clear text.

Quick Heal Total Security before 19.0 allows attackers with local admin rights to modify sensitive anti virus settings via a brute-attack on the settings password.

Quick Heal Total Security 64 bit 17.00 (QHTS64.exe), (QHTSFT64.exe) - Version 10.0.1.38; Quick Heal Total Security 32 bit 17.00 (QHTS32.exe), (QHTSFT32.exe) - Version 10.0.1.38; Quick Heal Internet Security 64 bit 17.00 (QHIS64.exe), (QHISFT64.exe) - Version 10.0.0.37; Quick Heal Internet Security 32 bit 17.00 (QHIS32.exe), (QHISFT32.exe) - Version 10.0.0.37; Quick Heal AntiVirus Pro 64 bit 17.00 (QHAV64.exe), (QHAVFT64.exe) - Version 10.0.0.37; and Quick Heal AntiVirus Pro 32 bit 17.00 (QHAV32.exe), (QHAVFT32.exe) - Version 10.0.0.37 allow DLL Hijacking because of Insecure Library Loading.