CVE-2020-24003Public exploit

Camera and microphone access via library injection

Published Jan 11, 2021 · Updated Aug 4, 2024

Library injection in Microsoft Skype 8.59.0.77 and earlier on macOS allows local users to access the microphone and camera without prompts. The Skype app disables library validation while a user-writable Electron Framework symlink determines which shared library its hardened runtime loads. A local process with the user's privileges can redirect that symlink to a crafted proxy library and inherit Skype's previously approved device access.

CVSS severity3.3
Low
EPSS probability1.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Library injection in Microsoft Skype 8.59.0.77 and earlier on macOS allows local users to access the microphone and camera without prompts. The Skype app disables library validation while a user-writable Electron Framework symlink determines which shared library its hardened runtime loads. A local process with the user's privileges can redirect that symlink to a crafted proxy library and inherit Skype's previously approved device access.

The record

CVE
CVE-2020-24003
Published
Jan 11, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1574.006
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 11, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1574.006Dynamic Linker Hijacking

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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