Heap-based Buffer Overflow Affecting proftpd/proftpd package, versions [,1.3.9c)[1.3.10rc1,1.3.10rc3-3)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published22 Jul 2026
- disclosed20 Jul 2026
- creditUnknown
Introduced: 20 Jul 2026
CVE-2026-63090 (opens in a new tab)How to fix?
Upgrade proftpd/proftpd to version 1.3.9c, 1.3.10rc3-3 or higher.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow via the fxp.c process. An attacker can execute arbitrary code by sending crafted SFTP packet fragments that exceed the reassembly buffer, leading to memory corruption and redirection of function pointers.