FortiADC 6-8 OOB Write CVE-2025-48839 (HTTP RQ)
CVE-2025-48839 Published on November 18, 2025
An Out-of-bounds Write vulnerability [CWE-787] in FortiADC 8.0.0, 7.6.0 through 7.6.2, 7.4.0 through 7.4.7, 7.2 all versions, 7.1 all versions, 7.0 all versions, 6.2 all versions may allow an authenticated attacker to execute arbitrary code via specially crafted HTTP requests.
Vulnerability Analysis
CVE-2025-48839 can be exploited with network access, and requires user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2025-48839 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2025-48839
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Affected Versions
Fortinet FortiADC:- Version 8.0.0 is affected.
- Version 7.6.0, <= 7.6.2 is affected.
- Version 7.4.0, <= 7.4.7 is affected.
- Version 7.2.0, <= 7.2.8 is affected.
- Version 7.1.0, <= 7.1.5 is affected.
- Version 7.0.0, <= 7.0.6 is affected.
- Version 6.2.0, <= 6.2.6 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.