How severe is CVE-2025-62691?

CVE-2025-62691 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-2025-62691 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-62691?

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-2025-62691 have an EU (EUVD) identifier?

Yes. CVE-2025-62691 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-199588.

When was CVE-2025-62691 published?

CVE-2025-62691 was published on 2025-11-25 and last updated on 2026-06-17.

CVE-2025-62691

CVE-2025-62691 is a critical-severity vulnerability 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-121.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.3
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-199588
Weakness: CWE-121
Published: 2025-11-25
Last modified: 2026-06-17

Description

Security Point (Windows) of MaLion and MaLionCloud contains a stack-based buffer overflow vulnerability in processing HTTP headers. Receiving a specially crafted request from a remote unauthenticated attacker could lead to arbitrary code execution with SYSTEM privilege.

Frequently asked questions

What is CVE-2025-62691?: Security Point (Windows) of MaLion and MaLionCloud contains a stack-based buffer overflow vulnerability in processing HTTP headers. Receiving a specially crafted request from a remote unauthenticated attacker could lead to arbitrary code execution with SYSTEM privilege.
How severe is CVE-2025-62691?: CVE-2025-62691 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-2025-62691 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-62691?: 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-2025-62691 have an EU (EUVD) identifier?: Yes. CVE-2025-62691 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-199588.
When was CVE-2025-62691 published?: CVE-2025-62691 was published on 2025-11-25 and last updated on 2026-06-17.

References

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