CVE-2022-26766

mediumpriority · track · 33EPSS 0.028 · 86 %ileexploit · PoCDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

2.81% (86th) EPSS

CVSS 4.3 · medium

Is it mine?

19 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

A certificate parsing issue was addressed with improved checks. This issue is fixed in tvOS 15.5, iOS 15.5 and iPadOS 15.5, Security Update 2022-004 Catalina, watchOS 8.6, macOS Big Sur 11.6.6, macOS Monterey 12.4. A malicious app may be able to bypass signature validation.

cvss

Technical severity, 0–10. One row per scoring source.

5.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:Nprimary · NVD / NIST USexploitability 1.8 · impact 3.6

v3.15.5mediumAV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:Nsecondary · ENISA EU

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:Nsecondaryexploitability 1.8 · impact 3.6

v3.15.2mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:Psecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-295USprimaryCWE-287USCWE-295US

exploits (1)

Public proof-of-concept and weaponised exploit code.

zhuowei/CoreTrustDemoProof-of-concept for CVE-2022-26766 on macOS 12.3.1PoC · poc_in_github

affected products (19)

Products and version ranges known to be affected.

Apple watchOSunspecified → 11.6enisa_euvdEU
Apple watchOSunspecified → 12.4enisa_euvdEU
Apple watchOSunspecified → 15.5enisa_euvdEU
Apple watchOSunspecified → 2022enisa_euvdEU
Apple watchOSunspecified → 8.6enisa_euvdEU
Apple Inc. MacOS≤ 12.4fstec_bduRU
Apple Inc. MacOS≤ 11.6.6fstec_bduRU
Apple Inc. iOS≤ 15.5fstec_bduRU
Apple Inc. iPadOS≤ 15.5fstec_bduRU
Apple Inc. tvOS≤ 15.5fstec_bduRU
Apple Inc. watchOS≤ 8.6fstec_bduRU
apple ipados< 15.5nvdUScpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple iphone os< 15.5nvdUScpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple mac os x< 10.15.7nvdUScpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
apple mac os x= 10.15.7nvdUScpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
apple macos11.0 → 11.6.6nvdUScpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple macos12.0 → 12.4nvdUScpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple tvos< 15.5nvdUScpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
apple watchos< 8.6nvdUScpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2022-1057Apple macOS: Mehrere SchwachstellenDeutsch2022-05-16csaf · cert_bundDE
Ein entfernter, anonymer, authentisierter oder lokaler Angreifer kann mehrere Schwachstellen in Apple macOS ausnutzen, um seine Privilegien zu erweitern, beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, einen Denial-of-Service-Zustand herbeizuführen, vertrauliche Informationen offenzulegen und im schlimmsten Fall das System zu kompromittieren.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd cert_bund NVD CVE.org MITRE

published 2022-05-26modified 2026-06-17

related (1,894)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2026-85102US	—OT critical	54.1% (99th)	KEV	2026-09-09
Improper certificate trust validation during VPN negotiation in Check Point Quantum Security Gateway may allow an unauthenticated remote attacker to execute arbitrary code on the G…
CVE-2023-41991US	medium5.5OT critical	13.4% (96th)	KEV	2023-09-21
A certificate validation issue was addressed. This issue is fixed in macOS Ventura 13.6, iOS 16.7 and iPadOS 16.7. A malicious app may be able to bypass signature validation. Apple…
CVE-2023-20963US	high7.8OT critical	1.47% (74th)	KEV	2023-03-24
In WorkSource, there is a possible parcel mismatch. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed…
CVE-2022-26923US	high9.0OT critical	83.5% (100th)	KEV	2022-05-10
Active Directory Domain Services Elevation of Privilege Vulnerability
CVE-2022-20703US	high8.0OT critical	9.20% (95th)	KEV	2022-02-10
Multiple vulnerabilities in Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers could allow an attacker to do any of the following: Execute arbitrary code Elevate pr…

+1889 more

references (24)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan