How severe is CVE-2025-49796?

CVE-2025-49796 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2025-49796 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-49796?

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-2025-49796 have an EU (EUVD) identifier?

Yes. CVE-2025-49796 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18415.

When was CVE-2025-49796 published?

CVE-2025-49796 was published on 2025-06-16 and last updated on 2026-06-29.

CVE-2025-49796

CVE-2025-49796 is a critical-severity vulnerability with a CVSS 3.x base score of 9.1. 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-125.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-18415
Weakness: CWE-125
Published: 2025-06-16
Last modified: 2026-06-29

Description

A vulnerability was found in libxml2. Processing certain sch:name elements from the input XML file can trigger a memory corruption issue. This flaw allows an attacker to craft a malicious XML input file that can lead libxml to crash, resulting in a denial of service or other possible undefined behavior due to sensitive data being corrupted in memory.

Frequently asked questions

What is CVE-2025-49796?: A vulnerability was found in libxml2. Processing certain sch:name elements from the input XML file can trigger a memory corruption issue. This flaw allows an attacker to craft a malicious XML input file that can lead libxml to crash, resulting in a denial of service or other possible undefined behavior due to sensitive data being corrupted in memory.
How severe is CVE-2025-49796?: CVE-2025-49796 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2025-49796 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-49796?: 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-2025-49796 have an EU (EUVD) identifier?: Yes. CVE-2025-49796 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18415.
When was CVE-2025-49796 published?: CVE-2025-49796 was published on 2025-06-16 and last updated on 2026-06-29.

References

Other CWE-125 (Out-of-bounds Read) vulnerabilities

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