FlexHEX 2.71 Stream Name unrestricted upload

Summaryinfo

A vulnerability was found in FlexHEX 2.71. It has been classified as critical. The affected element is an unknown function. The manipulation of the argument Stream Name leads to unrestricted upload. This vulnerability is documented as CVE-2019-25627. The attack needs to be performed locally. Additionally, an exploit exists.

Detailsinfo

A vulnerability, which was classified as critical, has been found in FlexHEX 2.71. This issue affects an unknown code block. The manipulation of the argument Stream Name with an unknown input leads to a unrestricted upload vulnerability. Using CWE to declare the problem leads to CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

FlexHEX 2.71 contains a local buffer overflow vulnerability in the Stream Name field that allows local attackers to execute arbitrary code by triggering a structured exception handler (SEH) overflow. Attackers can craft a malicious text file with carefully aligned shellcode and SEH chain pointers, paste the contents into the Stream Name dialog, and execute arbitrary commands like calc.exe when the exception handler is triggered.

The weakness was released by Chris Au as 46665. The advisory is shared at exploit-db.com. The identification of this vulnerability is CVE-2019-25627 since 03/24/2026. The exploitation is known to be easy. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. MITRE ATT&CK project uses the attack technique T1608.002 for this issue.

The exploit is available at exploit-db.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Exploit-DB (46665). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• FlexHEX

Version

• 2.71

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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