CVE-2021-4464 (GCVE-0-2021-4464)
Vulnerability from cvelistv5 – Published: 2025-11-12 22:09 – Updated: 2025-11-21 15:36
VLAI
EPSS
VEX
Title
FIberHome AN5506-04-FA / HG6245D Routers Remote Stack Overflow
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-11-13 14:30 UTC
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
VulnCheck
CNA
References
3 references
| URL | Tags |
|---|---|
| https://pierrekim.github.io/blog/2021-01-12-fiber… | technical-descriptionexploit |
| https://pierrekim.github.io/advisories/2021-fiber… | technical-descriptionexploit |
| https://www.vulncheck.com/advisories/fiberhome-ro… | third-party-advisory |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| FiberHome | AN5506-04-FA |
Affected:
0 , ≤ RP2631
(custom)
cpe:2.3:o:fiberhome:an5506-04-fa_firmware:*:*:*:*:*:*:*:* |
|
| FiberHome | HG6245D |
Affected:
0 , < RP2602
(custom)
cpe:2.3:o:fiberhome:hg6245d_firmware:*:*:*:*:*:*:*:* |
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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