CVEvulnerability
CVE-2021-4464
9.3 CRITICAL
Official page ↗
- Status
- Deferred
- Published
- 2025-11-12
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 9.3 CRITICAL — CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Weaknesses
- CWE-121
Description
FiberHome AN5506-04-FA firmware versions up to and including RP2631 and HG6245D prior to RP2602 contain a stack-based buffer overflow, as the HTTP service ('webs') fails to enforce maximum lengths for Cookie header values. When a cookie longer than 511 bytes is processed, a stack buffer is overrun, leading to a crash or potential control of execution flow.
Related
Weakness · CWE (1)
- CWE-121 Stack-based Buffer Overflow weakness
References
- https://pierrekim.github.io/advisories/2021-fiberhome-0x00-ont.txt pierrekim.github.io
- https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#misc-remote-stack-overflow-an5506 pierrekim.github.io
- https://www.vulncheck.com/advisories/fiberhome-routers-remote-stack-overflow www.vulncheck.com