CVE-2019-25627

CVE-2019-25627 is a high-severity vulnerability in Flexhex with a CVSS 3.x base score of 8.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Description

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.

Frequently asked questions

What is CVE-2019-25627?
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.
How severe is CVE-2019-25627?
CVE-2019-25627 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-25627 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-25627?
CVE-2019-25627 affects Flexhex. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-25627?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2019-25627 have an EU (EUVD) identifier?
Yes. CVE-2019-25627 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-19994.
When was CVE-2019-25627 published?
CVE-2019-25627 was published on 2026-03-24 and last updated on 2026-06-17.

References

Affected products (1)

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