CVE-2026-20637: Use After Free
Published Feb 11, 2026
·Updated
802.1X. An authentication issue was addressed with improved state management.
Other sources
A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.3 and iPadOS 26.3, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 26.3. An app may be able to cause unexpected system termination.
— MITRE
Accessibility. A privacy issue was addressed by removing sensitive data.
— Apple
Accessibility. An inconsistent user interface issue was addressed with improved state management.
— Apple
Accounts. An authorization issue was addressed with improved state management.
— Apple
Admin Framework. A parsing issue in the handling of directory paths was addressed with improved path validation.
— Apple
Credit
Johnny Franks (zeroxjf), an anonymous researcher, jioundai, Anonymous(Trend Micro Zero Day Initiative), Yiğit Can YILMAZ@@yilmazcanyigit, Golden Helm Securities(Iru), Gergely Kalman@@gergely_kalman(Iru), Csaba Fitzl@@theevilbit(Iru), Google Threat Analysis Group, Asaf Cohen, George Karchemsky@@gkarchemsky(Trend Micro Zero Day Initiative), Jian Lee@@speedyfriend433, Xin'an Zhou, Juefei Pu, Zhutian Liu, Zhiyun Qian, Zhaowei Tan, Srikanth V. Krishnamurthy, Mathy Vanhoef, CVE-2025-59375, Noah Gregory (wts.dev), Gongyu Ma@@Mezone0, EntryHi, Wong Wee Xiang, Loh Boon Keat, Jacob Prezant (prezant.us), Nils Hanff @chaos.social)@@nils1729(Hasso Plattner Institute), Amy (amys.website), Atul Kishor Jaiswal, Gergely Kalman@@gergely_kalman, Kirin@@Pwnrin, Keisuke Hosoda, Zhongcheng Li(IES Red Team), Richard Hyunho Im at Route Zero Security (routezero.security)@@richeeta, Ron Masas(BreakPoint), Rodolphe Brunetti@@eisw0lf(Lupus Nova), Dalibor Milanovic, Óscar García Pérez, Stanislav Jelezoglo, Viktor Lord Härringtón, Enis Maholli (enismaholli.com), LeminLimez, Nathaniel Oh@@calysteon, HanQing(TSDubhe), Nan Wang@@eternalsakura13, Tom Van Goethem, Wang Yu(Cyberserval), Mickey Jin@@patch1t, Ryan Dowd@@_rdowd, @@cloudlldb, Kirin@@Pwnrin(Fudan University), LFY@@secsys(Fudan University), Murray Mike, Chunyu Song(NorthSea), Michael DePlante@@izobashi(Trend Micro Zero Day Initiative), Pwn2car, Morris Richman@@morrisinlife, Vivek Dhar, ASI (RM) in Border Security Force, FTR HQ BSF Kashmir, Héloïse Gollier, Mathy Vanhoef (KU Leuven), Justin Cohen(Google), Cristian Dinca (icmd.tech), Hossein Lotfi@@hosselot(TrendAI Zero Day Initiative), Etienne Charron (Renault), Victoria Martini (Renault), CVE-2025-14524, Andreas Jaegersberger & Ro Achterberg(Nosebeard Labs), CVE-2025-64505, iG0x72(XiguaSec), JJ(XiguaSec), Lehan Dilusha Jayasinghe, Gor Aleksanyan(BoB 0xB6), Dhiyanesh Selvaraj@@redroot97(BoB 0xB6), 이동하 (Lee Dong Ha(BoB 0xB6), Johnny Franks@@zeroxjf, Alex Radocea, Hazem Issa, Yongdae Kim @ SysSec, KAIST, Caspian Tarafdar, Andrew Becker, webb, Thomas Espach, Mike Cardwell(grepular), Bob Lord, Hongze Wu(Ant Group Infrastructure Security Team), Shuaike Dong(Ant Group Infrastructure Security Team), @@hamayanhamayan, Rosyna Keller(Totally Not Malicious Software), CVE-2025-55753, CVE-2025-58098, CVE-2025-59775, CVE-2025-65082, CVE-2025-66200, Jex Amro, YingQi Shi@@Mas0nShi(DBAppSecurity's WeBin lab), 风沐云烟@@binary_fmyy, Minghao Lin@@Y1nKoc, DARKNAVY@@DarkNavyOrg, hari shanmugam, Sreejith Krishnan R, Himanshu Bharti@@Xpl0itme(Khatima), Matej Moravec@@MacejkoMoravec, Dawuge(Shuffle Team), Hunan University, Kun Peeks@@SwayZGl1tZyyy, Gyujeong Jin at Team.0xb6@@G1uN4sh, wdszzml, Atuin Automated Vulnerability Discovery Engine, Christian Kohlschütter, Dave G., @@pixiepointsec
Affected Software
20 affected componentsFixes available
Apple iOS<18.7.7
18.7.7
Apple iPadOS<18.7.7
18.7.7
Apple macOS Sequoia<15.7.5
15.7.5
Apple macOS Sonoma<14.8.5
14.8.5
Apple WatchOS<26.3
26.3
Apple tvOS<26.3
26.3
Apple iOS<26.3
26.3
Apple iPadOS<26.3
26.3
Apple macOS Tahoe<26.3
26.3
Apple visionOS<26.3
26.3
Apple iPadOS<18.7.7
Apple iPadOS>=26.0<26.3
Apple iPhone OS<18.7.7
Apple iPhone OS>=26.0<26.3
Apple macOS>=14.0<14.8.5
Apple macOS>=15.0<15.7.5
Apple macOS>=26.0<26.3
Apple tvOS<26.3
Apple visionOS<26.3
Apple WatchOS<26.3
Event History
Feb 11, 2026
Data Sourced
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
Affected Software
Updated
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Mar 24, 2026
Updated
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
Affected Software
Mar 25, 2026
CVE Published
via MITRE·12:32 AM
Data Sourced
via MITRE·12:32 AM
DescriptionWeakness
Data Sourced
via NVD·01:17 AM
DescriptionSeverityWeaknessAffected Software
May 12, 2026
Updated
via Apple·06:36 PM
DescriptionWeaknessAffected Software
Updated
via Apple·06:36 PM
Affected Software
Parent advisories
This vulnerability appears in the following advisories.
Peer vulnerabilities
Found alongside the following vulnerabilities.
- CVE-2026-20637
- CVE-2026-20650
- CVE-2026-20611
- CVE-2026-20609
- CVE-2026-20617
- CVE-2026-20627
- CVE-2025-14174
- CVE-2025-43529
- CVE-2026-20700
- CVE-2026-20649
- CVE-2026-20675
- CVE-2026-20634
- CVE-2026-20654
- CVE-2026-20671
- CVE-2025-59375
- CVE-2026-20667
- CVE-2026-20628
- CVE-2026-20641
- CVE-2026-20635
- CVE-2026-20645
- CVE-2026-20674
- CVE-2026-20638
- CVE-2026-20660
- CVE-2026-20686
- CVE-2026-20615
- CVE-2026-20668
- CVE-2026-20626
- CVE-2026-20663
- CVE-2026-20655
- CVE-2026-20677
- CVE-2026-20694
- CVE-2026-20642
- CVE-2026-20678
- CVE-2026-28855
- CVE-2026-20682
- CVE-2026-20653
- CVE-2026-20680
- CVE-2026-20606
- CVE-2026-20640
- CVE-2026-20661
- CVE-2026-20652
- CVE-2026-20608
- CVE-2026-20676
- CVE-2026-20644
- CVE-2026-20636
- CVE-2026-20621
- CVE-2026-20669
- CVE-2026-20670
- CVE-2026-20625
- CVE-2026-20624
- CVE-2026-20639
- CVE-2026-20681
- CVE-2026-20629
- CVE-2026-20601
- CVE-2026-20623
- CVE-2026-20620
- CVE-2026-20630
- CVE-2026-20673
- CVE-2026-20651
- CVE-2026-20616
- CVE-2026-20603
- CVE-2026-20666
- CVE-2026-20614
- CVE-2026-20656
- CVE-2026-20658
- CVE-2026-20610
- CVE-2026-20622
- CVE-2026-20648
- CVE-2026-20662
- CVE-2026-20647
- CVE-2026-20612
- CVE-2026-20699
- CVE-2026-20619
- CVE-2026-20618
- CVE-2026-20605
- CVE-2026-20646
- CVE-2026-20602
- CVE-2026-28865
- CVE-2026-28879
- CVE-2026-28866
- CVE-2026-20690
- CVE-2026-28886
- CVE-2026-28878
- CVE-2025-14524
- CVE-2026-28876
- CVE-2026-28880
- CVE-2025-64505
- CVE-2025-43534
- CVE-2026-28868
- CVE-2026-28867
- CVE-2026-20687
- CVE-2026-28864
- CVE-2026-28860
- CVE-2026-28967
- CVE-2026-28852
- CVE-2026-20657
- CVE-2026-20665
- CVE-2026-20643
- CVE-2025-43376
- CVE-2026-28861
- CVE-2026-28871
- CVE-2026-28877
- CVE-2025-55753
- CVE-2025-58098
- CVE-2025-59775
- CVE-2025-65082
- CVE-2025-66200
- CVE-2026-28824
- CVE-2026-28822
- CVE-2026-28894
- CVE-2026-28821
- CVE-2026-28838
- CVE-2026-28888
- CVE-2026-20633
- CVE-2026-28892
- CVE-2026-28832
- CVE-2026-28834
- CVE-2026-20695
- CVE-2026-28829
- CVE-2026-20607
- CVE-2026-20692
- CVE-2026-28891
- CVE-2026-20701
- CVE-2026-28839
- CVE-2026-28827
- CVE-2026-28816
- CVE-2026-28826
- CVE-2026-20693
- CVE-2026-28862
- CVE-2026-28831
- CVE-2026-28817
- CVE-2026-20688
- CVE-2026-28835
- CVE-2026-28825
- CVE-2026-28818
- CVE-2026-20697
- CVE-2026-28828
Frequently Asked Questions
1
What is the severity of CVE-2026-20637?
CVE-2026-20637 is an authentication issue that affects Apple devices and poses significant security risks if not addressed.
2
How do I fix CVE-2026-20637?
To fix CVE-2026-20637, update your affected Apple device to the latest version, such as iOS 18.7.7 or iPadOS 18.7.7.
3
Which Apple products are affected by CVE-2026-20637?
CVE-2026-20637 affects various Apple products, including iOS, iPadOS, macOS Sequoia, macOS Sonoma, watchOS, tvOS, macOS Tahoe, and visionOS.
4
What are the recommended software versions to mitigate CVE-2026-20637?
To mitigate CVE-2026-20637, it is recommended to upgrade to at least iOS 18.7.7 or iPadOS 18.7.7, macOS Sequoia 15.7.5, or macOS Sonoma 14.8.5.
5
What improvements address the issues in CVE-2026-20637?
CVE-2026-20637 has been addressed with improved state management and better memory management to prevent authentication issues.