Is CVE-2020-9934 actively exploited?

Yes. KEV Intelligence tracks CVE-2020-9934 as a known exploited vulnerability. Confidence is confirmed.

What exploitation activity has KEV Intelligence observed?

KEV Intelligence has not yet recorded sensor-observed exploitation attempts for CVE-2020-9934. Our sensors continue to monitor for activity targeting this CVE.

Which versions are affected?

CVE-2020-9934 affects Apple iOS, macOS. Reported affected versions include unspecified to < iOS 13.6 and iPadOS 13.6 and unspecified to < macOS Catalina 10.15.6.

Yes. CVE-2020-9934 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2020-9934

Q: How should organizations remediate it?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Q: Is it in CISA KEV?

Yes. CVE-2020-9934 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

iOS

Apple / iOS · affected before iOS 13.6 and iPadOS 13.6

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Severity: CVSS 5.5 · Medium
Confidence: Confirmed
Exploit status: Exploited in the wild
EPSS: 3.2%
First observed: —
Last observed: —

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2020-9934 is a vulnerability affecting Apple iOS, macOS. An issue existed in the handling of environment variables. This issue was addressed with improved validation. This issue is fixed in iOS 13.6 and iPadOS...

Is it exploited?

Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.

Who is affected?

Apple / iOS affected before ios 13.6 and ipados 13.6.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

An issue existed in the handling of environment variables

An issue existed in the handling of environment variables. This issue was addressed with improved validation.

This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6. A local user may be able to view sensitive user information.

Vendor Product Affected Status

Apple iOS Before iOS 13.6 and iPadOS 13.6 Affected

Apple macOS Before macOS Catalina 10.15.6 Affected

Published: 16 Oct 2020
Exploitation Reported: 08 Sep 2022
Attack vector: Local
Complexity: Low
Privileges: Low
User interaction: None

CVE References

CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2020-9934
support.apple.com/HT211289 support.apple.com · CVE Record https://support.apple.com/HT211289
support.apple.com/HT211288 support.apple.com · CVE Record https://support.apple.com/HT211288

Exploitation evidence

Why KEV Intelligence marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 08 Sep 2022

Independent exploitation attestation added to the KEV Intelligence record.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.

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Source	Added
CISA First	2022-09-08 00:00 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets: 0
User-Agents: 0

Raw values available in Pro and Enterprise.

Scanner coverage

Nessus template detected 02 Jun 2025.

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Virtual patch status

No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

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Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner	Reference	Detected
Nessus	https://www.tenable.com/plugins/nessus/141100	02 Jun 2025

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

5.5 Medium

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

3.2%

All CVSS Scores

CVSS v3.1 5.5 Medium

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS v2.0 2.1 Low

AV:L/AC:L/Au:N/C:P/I:N/A:N

Timeline

From disclosure to observed exploitation

02 Jun 2025
Nessus plugin available

Scanner coverage available
08 Sep 2022
Added to CISA KEV

Listed in the CISA Known Exploited Vulnerabilities catalog
16 Oct 2020
CVE published

Vulnerability disclosed publicly
02 Mar 2020
CVE ID reserved

Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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Evidence confidence and provenance
First-party sensor telemetry
PoC and scanner references
Affected versions and enrichment
Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2020-9934

Free JSON includes basic KEV fields

{
  "cve_id": "CVE-2020-9934",
  "confidence": "Confirmed",
  "cvss_score": 5.5,
  "cvss_estimated": false,
  "epss_score": 0.03208,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}

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