CVE-2025-58447: rAthena is an open-source cross-platform massively multiplayer online role playing game (MMORPG) server

Q: How do I fix CVE-2025-58447?

rathena: upgrade to 2025-09-06. Exact commands for each OS are on this page.

Q: Is CVE-2025-58447 being exploited?

CVE-2025-58447 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-58447 affect?

CVE-2025-58447 affects rathena. Severity is critical (CVSS 9.8). rAthena is an open-source cross-platform massively multiplayer online role playing game (MMORPG) server. Versions prior to commit 2f5248b have a heap-based buffer overflow in the login server, remote attacker to overwrite adjacent session f

Q: How urgent is CVE-2025-58447?

Priority 54/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2025-58447 is a critical-severity flaw (CVSS 9.8) affecting rathena. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

rAthena is an open-source cross-platform massively multiplayer online role playing game (MMORPG) server. Versions prior to commit 2f5248b have a heap-based buffer overflow in the login server, remote attacker to overwrite adjacent session fields by sending a crafted `CA_SSO_LOGIN_REQ` with an oversized token length. This leads to immediate denial of service (crash) and it is possible to achieve remote code execution via heap corruption. Commit 2f

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-122, CWE-787
Published	2025-09-09
Last modified	2026-10-19

Publisher (CNA): GitHub, Inc. · Vendor: rathena

Last updated 2026-10-19 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-09-09 23:15 UTCPublished CVE record published
2026-10-19 17:10 UTCUpdated Record last modified

rathena rathena UPGRADE

Affected: < 2025-09-06

Fixed in: 2025-09-06

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy rathena || rpm -q rathena || rathena --version

2. UPGRADE to 2025-09-06 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade rathena

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade rathena

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-58447?

rathena: upgrade to 2025-09-06. Exact commands for each OS are on this page.

Is CVE-2025-58447 being exploited?

CVE-2025-58447 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-58447 affect?

CVE-2025-58447 affects rathena. Severity is critical (CVSS 9.8). rAthena is an open-source cross-platform massively multiplayer online role playing game (MMORPG) server. Versions prior to commit 2f5248b have a heap-based buffer overflow in the login server, remote attacker to overwrite adjacent session f

How urgent is CVE-2025-58447?

Priority 54/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-58448 CRITICAL 9.1 UPGRADE rAthena is an open-source cross-platform massively multiplayer online role playing game (MMORPG) server
CVE-2025-58750 HIGH 8.2 UPGRADE rAthena is an open-source cross-platform massively multiplayer online role playing game (MMORPG) server
CVE-2025-62170 HIGH 7.5 UPGRADE rAthena is an open-source cross-platform MMORPG server

References

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