Heap-Based Buffer Overflow Vulnerability in rAthena MMORPG Server
CVE-2025-58447

9.8CRITICAL

Key Information:

Vendor

Rathena

Status
Rathena
Vendor
CVE Published:
9 September 2025

What is CVE-2025-58447?

The rAthena MMORPG server suffers from a heap-based buffer overflow vulnerability in its login server. Attackers can exploit this flaw by sending a specially crafted CA_SSO_LOGIN_REQ message containing an oversized token length. This could lead to denial of service due to server crashes, and it may allow attackers to achieve remote code execution through heap corruption. The issue has been addressed in commit 2f5248b, making it crucial for users to update their servers to the latest version.

Affected Version(s)

rathena < 2f5248b

References

https://github.com/rathena/rathena/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/rathena/rathena/commit/2f5248b9cd9a8c6...
x_refsource_MISC

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2025-58447 : Heap-Based Buffer Overflow Vulnerability in rAthena MMORPG Server