October 2026 CVE archive
Records last modified in NIST NVD between Oct 1 and Oct 31, 2026 (UTC). Data imported from the NVD CVE API 2.0 and the CISA KEV catalog; each record shows its own source and verification time. The modified view only includes records that were CRITICAL or CISA-KEV-listed when imported — it is not a complete list of every modification.
Total records
24,596
Critical
3,297
High
7,980
Medium
7,645
Low
740
Severity not reported
4,934
In CISA KEV
191
Most affected vendors (by CPE data where available): microsoft (1424), google (825), linux (722), ibm (323), oracle (193), mozilla (182), adobe (165), broadcom (118), apache (116), fabian (98)
| CVE | Severity | CVSS | KEV | Vendor / product | Published | Modified |
|---|---|---|---|---|---|---|
| CVE-2026-83516 Out-of-bounds read in Windows Local Security Authority Subsystem Service (LSASS)... |
high | 7.5 | — | Microsoft / windows 10 1809 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83580 Heap-based buffer overflow in Windows Client-Side Caching (CSC) Service allows a... |
high | 7.0 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83583 Improper access control in Windows Geotag Broker allows an authorized attacker t... |
high | 7.8 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83586 Weak authentication in Windows Resilient File System (ReFS) Deduplication Servic... |
high | 7.8 | — | Microsoft / windows 11 23h2 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83587 Untrusted pointer dereference in Windows Core Messaging allows an authorized att... |
high | 7.8 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83641 Heap-based buffer overflow in Windows Media allows an authorized attacker to ele... |
high | 7.8 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83692 Heap-based buffer overflow in Windows Bind Filter Driver allows an authorized at... |
high | 7.8 | — | Microsoft / windows 10 21h2 | 2026-10-13 | 2026-10-29 |
| CVE-2026-85943 Time-of-check time-of-use (toctou) race condition in Reliable Multicast Transpor... |
high | 7.0 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83700 Use after free in Windows Now Playing Session Manager allows an authorized attac... |
high | 7.8 | — | Microsoft / windows 10 1809 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83701 Use after free in Windows Now Playing Session Manager allows an authorized attac... |
high | 7.0 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-85864 Improper privilege management in Python allows an authorized attacker to elevate... |
high | 7.8 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83702 Use after free in Windows Installer allows an authorized attacker to elevate pri... |
high | 7.0 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-85881 Stack-based buffer overflow in Microsoft Graphics Component allows an authorized... |
high | 8.0 | — | Microsoft / 365 copilot | 2026-10-13 | 2026-10-29 |
| CVE-2026-83687 Use after free in Windows Connected User Experiences and Telemetry allows an aut... |
high | 7.0 | — | Microsoft / windows 11 23h2 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83689 Use after free in Windows Error Reporting allows an authorized attacker to eleva... |
high | 7.0 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83715 Missing authentication for critical function in Windows Error Reporting allows a... |
high | 7.1 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83716 Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to e... |
high | 8.8 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83717 Use after free in Windows Installer allows an authorized attacker to elevate pri... |
high | 7.0 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83718 Use after free in Windows Installer allows an authorized attacker to elevate pri... |
high | 7.0 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-87692 Deserialization of untrusted data in Microsoft Exchange Server allows an authori... |
high | 7.8 | — | Microsoft / exchange server | 2026-10-13 | 2026-10-29 |
| CVE-2026-83720 Use after free in Windows Kerberos allows an authorized attacker to elevate priv... |
high | 7.0 | — | Microsoft / windows 11 26h1 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83721 Use after free in Windows Win32K allows an authorized attacker to elevate privil... |
high | 7.8 | — | Microsoft / windows 11 24h2 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83724 Heap-based buffer overflow in Windows Management Instrumentation allows an autho... |
high | 7.0 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83707 Use after free in Windows Event Tracing allows an authorized attacker to elevate... |
high | 7.0 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83708 Stack-based buffer overflow in Windows Installer allows an authorized attacker t... |
high | 7.0 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83709 Heap-based buffer overflow in Windows NTLM allows an authorized attacker to elev... |
high | 7.8 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83710 Use after free in Windows Device Association Service allows an authorized attack... |
high | 7.0 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83726 Use after free in Windows DWM Core Library allows an authorized attacker to elev... |
high | 7.8 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83727 Buffer over-read in Windows Overlay Filter allows an authorized attacker to elev... |
high | 7.8 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83728 Improper validation of syntactic correctness of input in Windows Hyper-V allows... |
high | 8.8 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-83732 Use after free in Windows Win32K allows an authorized attacker to elevate privil... |
high | 7.8 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-85829 Double free in Windows Wired AutoConfig Service allows an authorized attacker to... |
high | 7.8 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-85832 Heap-based buffer overflow in Windows Background Intelligent Transfer Service (B... |
high | 7.8 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-85833 Use after free in Windows Modern Device Management (MDM) allows an authorized at... |
high | 7.8 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-85834 Heap-based buffer overflow in Windows TCP/IP allows an authorized attacker to el... |
high | 7.0 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-85842 Use of externally-controlled format string in Windows Image Acquisition allows a... |
high | 7.8 | — | Microsoft / windows 10 21h2 | 2026-10-13 | 2026-10-29 |
| CVE-2026-85843 Use of uninitialized resource in Windows Background Intelligent Transfer Service... |
high | 7.8 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-85846 Use after free in Windows Web Account Manager allows an authorized attacker to e... |
high | 7.0 | — | Microsoft / windows 10 1809 | 2026-10-13 | 2026-10-29 |
| CVE-2026-85848 Heap-based buffer overflow in Windows Background Intelligent Transfer Service (B... |
high | 7.8 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
| CVE-2026-85849 Improper link resolution before file access ('link following') in Windows AppX D... |
high | 7.8 | — | Microsoft / windows 10 1607 | 2026-10-13 | 2026-10-29 |
Sources: NIST NVD (CVE API 2.0) and the CISA KEV catalog. Severity is as stated by the source; missing values are shown as “not reported”, never estimated.