CVE-2025-49795Network attack vector

Service crash via unchecked XPath evaluation result

Published Jun 16, 2025 · Updated Jul 7, 2026

NULL pointer dereference in libxml2 2.10.0 through 2.14.4 allows remote attackers to crash applications via crafted Schematron XML. In xmlSchematronFormatReport, a failed xmlXPathCompiledEval call returns NULL, but the result's type is dereferenced without a check. Reachability requires validation of attacker-supplied XML with a Schematron value-of expression; the bounded consequence is process termination.

CVSS severity7.5
High
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in libxml2 2.10.0 through 2.14.4 allows remote attackers to crash applications via crafted Schematron XML. In xmlSchematronFormatReport, a failed xmlXPathCompiledEval call returns NULL, but the result's type is dereferenced without a check. Reachability requires validation of attacker-supplied XML with a Schematron value-of expression; the bounded consequence is process termination.

The record

CVE
CVE-2025-49795
Published
Jun 16, 2025
Updated
Jul 7, 2026
Vendor
XMLSoft
Product
libxml2
Classifications
CWE-825, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.10.0 <2.14.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

XMLSoft · libxml2version=2.10.0 <2.14.5
389 Directory Server · Red Hat Enterprise Linux 10Affected versions are unavailable in this record.
389 Directory Server · Red Hat Hardened ImagesAffected versions are unavailable in this record.
Siemens · RUGGEDCOM RST2428Pversion=0 <V4.0

Published CVSS scores

7.5Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-825Expired Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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