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Vulnerability details: VCID-x8gp-vvxg-13cw
Vulnerability ID VCID-x8gp-vvxg-13cw
Aliases CVE-2021-46143
Summary Multiple vulnerabilities have been discovered in Expat, the worst of which could result in arbitrary code execution.
Status Published
Exploitability 0.5
Weighted Severity 7.3
Risk 3.6
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-190 Integer Overflow or Wraparound
System Score Found at
cvssv3 7.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-46143.json
epss 0.04085 https://api.first.org/data/v1/epss?cve=CVE-2021-46143
epss 0.04085 https://api.first.org/data/v1/epss?cve=CVE-2021-46143
epss 0.04085 https://api.first.org/data/v1/epss?cve=CVE-2021-46143
epss 0.04085 https://api.first.org/data/v1/epss?cve=CVE-2021-46143
epss 0.04085 https://api.first.org/data/v1/epss?cve=CVE-2021-46143
epss 0.04085 https://api.first.org/data/v1/epss?cve=CVE-2021-46143
epss 0.04085 https://api.first.org/data/v1/epss?cve=CVE-2021-46143
epss 0.04085 https://api.first.org/data/v1/epss?cve=CVE-2021-46143
cvssv3.1 8.1 https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
ssvc Track* https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
cvssv3.1 8.1 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 8.1 https://github.com/libexpat/libexpat/issues/532
ssvc Track* https://github.com/libexpat/libexpat/issues/532
cvssv3.1 8.1 https://github.com/libexpat/libexpat/pull/538
ssvc Track* https://github.com/libexpat/libexpat/pull/538
cvssv3.1 8.1 https://security.gentoo.org/glsa/202209-24
ssvc Track* https://security.gentoo.org/glsa/202209-24
cvssv3.1 8.1 https://security.netapp.com/advisory/ntap-20220121-0006/
ssvc Track* https://security.netapp.com/advisory/ntap-20220121-0006/
cvssv3.1 8.1 https://www.debian.org/security/2022/dsa-5073
ssvc Track* https://www.debian.org/security/2022/dsa-5073
cvssv3.1 8.1 https://www.tenable.com/security/tns-2022-05
ssvc Track* https://www.tenable.com/security/tns-2022-05
cvssv3.1 8.1 http://www.openwall.com/lists/oss-security/2022/01/17/3
ssvc Track* http://www.openwall.com/lists/oss-security/2022/01/17/3
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-46143.json
https://api.first.org/data/v1/epss?cve=CVE-2021-46143
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-45960
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-46143
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22822
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22823
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22824
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22825
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22826
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22827
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23852
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23990
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
1012179 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1012179
2044455 https://bugzilla.redhat.com/show_bug.cgi?id=2044455
3 http://www.openwall.com/lists/oss-security/2022/01/17/3
532 https://github.com/libexpat/libexpat/issues/532
538 https://github.com/libexpat/libexpat/pull/538
dsa-5073 https://www.debian.org/security/2022/dsa-5073
GLSA-202209-24 https://security.gentoo.org/glsa/202209-24
ntap-20220121-0006 https://security.netapp.com/advisory/ntap-20220121-0006/
RHSA-2022:0951 https://access.redhat.com/errata/RHSA-2022:0951
RHSA-2022:1069 https://access.redhat.com/errata/RHSA-2022:1069
RHSA-2022:7144 https://access.redhat.com/errata/RHSA-2022:7144
RHSA-2022:7692 https://access.redhat.com/errata/RHSA-2022:7692
RHSA-2025:22785 https://access.redhat.com/errata/RHSA-2025:22785
RHSA-2025:22871 https://access.redhat.com/errata/RHSA-2025:22871
ssa-484086.pdf https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
tns-2022-05 https://www.tenable.com/security/tns-2022-05
USN-5288-1 https://usn.ubuntu.com/5288-1/
USN-7199-1 https://usn.ubuntu.com/7199-1/
USN-7913-1 https://usn.ubuntu.com/7913-1/
USN-USN-5455-1 https://usn.ubuntu.com/USN-5455-1/
No exploits are available.
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-46143.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

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none

required

unchanged

changed

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none

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low

none

high

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none
Vector: CVSS:3.1/AC:H/AV:N/A:H/C:H/I:H/PR:N/S:U/UI:N Found at https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

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none

required

unchanged

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Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-23T13:17:07Z/ Found at https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

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none

required

unchanged

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none
Vector: CVSS:3.1/AC:H/AV:N/A:H/C:H/I:H/PR:N/S:U/UI:N Found at https://github.com/libexpat/libexpat/issues/532
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-23T13:17:07Z/ Found at https://github.com/libexpat/libexpat/issues/532
Vector: CVSS:3.1/AC:H/AV:N/A:H/C:H/I:H/PR:N/S:U/UI:N Found at https://github.com/libexpat/libexpat/pull/538
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-23T13:17:07Z/ Found at https://github.com/libexpat/libexpat/pull/538
Vector: CVSS:3.1/AC:H/AV:N/A:H/C:H/I:H/PR:N/S:U/UI:N Found at https://security.gentoo.org/glsa/202209-24
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-23T13:17:07Z/ Found at https://security.gentoo.org/glsa/202209-24
Vector: CVSS:3.1/AC:H/AV:N/A:H/C:H/I:H/PR:N/S:U/UI:N Found at https://security.netapp.com/advisory/ntap-20220121-0006/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-23T13:17:07Z/ Found at https://security.netapp.com/advisory/ntap-20220121-0006/
Vector: CVSS:3.1/AC:H/AV:N/A:H/C:H/I:H/PR:N/S:U/UI:N Found at https://www.debian.org/security/2022/dsa-5073
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-23T13:17:07Z/ Found at https://www.debian.org/security/2022/dsa-5073
Vector: CVSS:3.1/AC:H/AV:N/A:H/C:H/I:H/PR:N/S:U/UI:N Found at https://www.tenable.com/security/tns-2022-05
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-23T13:17:07Z/ Found at https://www.tenable.com/security/tns-2022-05
Vector: CVSS:3.1/AC:H/AV:N/A:H/C:H/I:H/PR:N/S:U/UI:N Found at http://www.openwall.com/lists/oss-security/2022/01/17/3
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2025-04-23T13:17:07Z/ Found at http://www.openwall.com/lists/oss-security/2022/01/17/3
Exploit Prediction Scoring System (EPSS)
Percentile 0.88513
EPSS Score 0.04085
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:58:38.266392+00:00 Gentoo Importer Import https://security.gentoo.org/glsa/202209-24 38.0.0