SecOps SignalSecurity Intelligence Workspace
Collection Degraded30 / 46 Sources HealthyPublic Intel Only
Vulnerabilities/CVE-2020-12762Public Intelligence Dossier
Source: json-c · Limited verification•Last verified: •Collection Degraded
CVE-2020-12762Unknown / EvaluatingHIGH (raw)CVSS 7.8CWE-190

json-c through 0.14 has an integer overflow and out-of-bounds write via a large JSON file, as demonstrated by printbuf_memappend.

Published: 09 May 2020•Last updated: 14 Oct 2026, 03:47 PM IST•Source identifier: cve@mitre.org
Dossier completeness: source-provided sections 2 / 3 · rule guidance not available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Unknown
KEV status was not determined.
CVSS score
7.8HIGH (raw)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Metric sourcenvd@nist.gov
EPSS probability
1.9%0.019
Percentile79th
Weakness type
CWE-190
CWE-787
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

json-c through 0.14 has an integer overflow and out-of-bounds write via a large JSON file, as demonstrated by printbuf_memappend.

SOC priority

High

Actively exploited

Unknown

Publicly disclosed

Unknown

Risk basis: SOC ecosystem technology relevance; HIGH severity; No confirmed exploitation signal in current enrichment

Affected Products & Remediation

5 source-backed products
Affected products and versions (source)
  • json-c json-c · < 0.15-20200726 · NVD CPE · Source
  • fedoraproject fedora · 30; 31; 32 · NVD CPE · Source
  • debian debian linux · 8.0; 9.0; 10.0 · NVD CPE · Source
  • canonical ubuntu linux · 12.04; 14.04; 16.04; 18.04; 19.10; 20.04 · NVD CPE · Source
  • siemens sinec ins · 1.0 · NVD CPE · Source
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

Not provided by source

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Unknown
Exploited (source statement)
Unknown
Publicly disclosed (source)
Unknown

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

No rule-based guidance for this vulnerability class

CISA KEV Record

CISA KEV status was not determined for this record.

Change History & Source Data

— No recorded material change

CNA / source
cve@mitre.org
Record status · verification
UPDATED · NVD API
CPE
cpe:2.3:a:json-c:json-c:*:*:*:*:*:*:*:*, cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*, cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*, cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*, cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*, cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*, cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*, cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*, cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*, cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*

Evidence & Provenance

3 public sources
github.comSource recordnvd.nist.govSource recordcert-portal.siemens.comSource record

Linked by the query's stored exact CVE association. Review required tables and validation status before use.

Detection Hunting Query
Target: DeviceTvmSoftwareVulnerabilities•Defender XDR
Detect endpoints exposed to CVE-2020-12762
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2020-12762
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2020-12762"| project DeviceId, DeviceName, OSPlatform, OSVersion, SoftwareVendor, SoftwareName, SoftwareVersion, CveId, VulnerabilitySeverityLevel, RecommendedSecurityUpdate, RecommendedSecurityUpdateId| sort by VulnerabilitySeverityLevel desc
Schema Checked · Not runtime validatedSource: SecOps Signal deterministic template · Limited verificationStatic screening: Passed structure and schema checks; tenant execution is not verified.
Open KQL Library

Correlated briefings

— No published briefing references this CVE

SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.