Home/CVE/In libexpat through 2.7.3, a crafted file with an approximate size of 2 MiB can lead to dozens of seconds of processing
CVE

CVE-2025-66382

In libexpat through 2.7.3, a crafted file with an approximate size of 2 MiB can lead to dozens of seconds of processing

In libexpat through 2.7.3, a crafted file with an approximate size of 2 MiB can lead to dozens of seconds of processing time.

LOW · CVSS 2.9 EPSS 0.0001
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-407Inefficient Algorithmic Complexity
▤

Affected Products & Versions

1
libexpat project libexpat<= 2.7.3
▣

Scoring & Timeline

2.9
LOW · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD28 Nov 2025 · 07:15 AM
CVSS VectorCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

4
suse-csafopenSUSE-SU-2026:10087-1
msrcCVE-2025-66382
siemens-csafSSA-082556
cisa-csafcisa-csaf-csaf_files-OT-white-2025-icsa-25-162-05
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/libexpat/libexpat/issues/1076Issue Tracking
http://www.openwall.com/lists/oss-security/2025/12/02/1Mailing List
https://cert-portal.siemens.com/productcert/html/ssa-082556.html
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