Exploitation Summary
EIP tracks 1 public exploit for CVE-2021-46143. PoCs published by nanopathi.
AI-analyzed exploit summary This repository appears to be a snapshot of the Expat library (version 2.2.6) with references to CVE-2021-46143, but it does not contain exploit code or a proof-of-concept. The files are standard library and build configuration files.
Description
In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize.
Exploits (1)
nomisec
WRITEUP
by nanopathi · poc
https://github.com/nanopathi/external_expat_AOSP10_r33_CVE-2021-46143
This repository appears to be a snapshot of the Expat library (version 2.2.6) with references to CVE-2021-46143, but it does not contain exploit code or a proof-of-concept. The files are standard library and build configuration files.
Classification
Writeup 90%
Attack Type
Other
Complexity
Trivial
Reliability
Theoretical
Target:
Expat 2.2.6
No auth needed
devstral-2 · analyzed Feb 16, 2026
Full analysis →
References (8)
Core 8
Core References
Exploit, Issue Tracking, Patch, Third Party Advisory x_refsource_misc
https://github.com/libexpat/libexpat/issues/532
Patch, Third Party Advisory x_refsource_misc
https://github.com/libexpat/libexpat/pull/538
Mailing List, Patch, Third Party Advisory mailing-list
x_refsource_mlist
http://www.openwall.com/lists/oss-security/2022/01/17/3
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20220121-0006/
Third Party Advisory x_refsource_confirm
https://www.tenable.com/security/tns-2022-05
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2022/dsa-5073
Patch, Third Party Advisory x_refsource_confirm
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
Third Party Advisory vendor-advisory
x_refsource_gentoo
https://security.gentoo.org/glsa/202209-24
Scores
CVSS v3
8.1
EPSS
0.0376
EPSS Percentile
88.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
total
Details
CWE
CWE-190
Status
published
Products (10)
libexpat_project/libexpat
< 2.4.3
netapp/active_iq_unified_manager
netapp/clustered_data_ontap
netapp/hci_baseboard_management_controller
h610c
netapp/hci_baseboard_management_controller
h610s
netapp/hci_baseboard_management_controller
h615c
netapp/oncommand_workflow_automation
netapp/solidfire_\&_hci_management_node
siemens/sinema_remote_connect_server
< 3.1
tenable/nessus
< 8.15.3
Published
Jan 06, 2022
Tracked Since
Feb 18, 2026