How severe is CVE-2025-58447?

CVE-2025-58447 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-58447 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-58447?

CVE-2025-58447 affects Rathena. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-58447?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-58447 have an EU (EUVD) identifier?

Yes. CVE-2025-58447 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34018.

When was CVE-2025-58447 published?

CVE-2025-58447 was published on 2025-09-09 and last updated on 2026-06-17.

CVE-2025-58447

CVE-2025-58447 is a critical-severity vulnerability in Rathena with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-34018
Weakness: CWE-787
Affected product: Rathena
Published: 2025-09-09
Last modified: 2026-06-17

Description

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 2f5248b fixes the issue.

Frequently asked questions

What is CVE-2025-58447?: 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 2f5248b fixes the issue.
How severe is CVE-2025-58447?: CVE-2025-58447 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-58447 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-58447?: CVE-2025-58447 affects Rathena. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-58447?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-58447 have an EU (EUVD) identifier?: Yes. CVE-2025-58447 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34018.
When was CVE-2025-58447 published?: CVE-2025-58447 was published on 2025-09-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:rathena:rathena:*:*:*:*:*:*:*:*

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CVE-2025-58448 — Critical (CVSS 9.1): rAthena is an open-source cross-platform massively multiplayer online role playing game (MMORPG) server. Versions prior…
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