CVE-2021-26718

Local antivirus protection bypass

Published Apr 1, 2021 · Updated Aug 3, 2024

Incorrect authorization in Kaspersky Internet Security for Mac before 21.1 allows local users to disable antivirus protection. Kaspersky has not published the affected component, the rejected authorization check, or the triggering input used to bypass protection. Exploitation requires low-privileged local access and compromises antivirus enforcement without reported data disclosure or service interruption.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Incorrect authorization in Kaspersky Internet Security for Mac before 21.1 allows local users to disable antivirus protection. Kaspersky has not published the affected component, the rejected authorization check, or the triggering input used to bypass protection. Exploitation requires low-privileged local access and compromises antivirus enforcement without reported data disclosure or service interruption.

The record

CVE
CVE-2021-26718
Published
Apr 1, 2021
Updated
Aug 3, 2024
Vendor
Kaspersky
Product
Kaspersky Internet Security for Mac
Classifications
CWE-863, T1562.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 1, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=prior to 21.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Kaspersky · Kaspersky Internet Security for Macversion=prior to 21.1

Published CVSS scores

2.1NIST National Vulnerability DatabaseAV:L/AC:L/Au:N/C:N/I:P/A:N
5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1562.001Impair Defenses: Disable or Modify Tools

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo