Junglewise

Monthly report

Most vulnerable technologies in October 2026

Final report, published . It does not change.

In October 2026, Junglewise Threat Intelligence recorded 16,643 new vulnerabilities: 1,051 critical, 4,731 high and 24 exploited in the wild. The most vulnerable technology was Microsoft Windows, with 677 vulnerabilities (21 critical, 1 exploited in the wild), followed by Linux Kernel (1,041) and Google Chrome (732).

New vulnerabilities
16,643
Critical
1,051
Exploited in the wild
24
Technologies affected
7,346

Ranking

Technologies ranked by exploited, critical and high severity vulnerabilities
#TechnologyVulnsCriticalHighExploitedMax CVSSMost severe
1Microsoft Windows
Microsoft
6772150419.8
2Linux Kernel
Linux
1,0410808.8
3Google Chrome
Google
73293409.6
4Microsoft Windows Server 2025
Microsoft
2981819519.8
5Microsoft Windows 11 24h2
Microsoft
2601118219.8
6Microsoft Windows 11 25h2
Microsoft
2601118219.8
7Microsoft Windows 11 26h2
Microsoft
2561117919.8
8Microsoft Windows 11 26h1
Microsoft
2541117519.8
9Microsoft Windows Server 2022
Microsoft
2461815219.8
10Microsoft Windows 11 23h2
Microsoft
2191115119.8
11Microsoft Windows Server 2019
Microsoft
2171613019.8
12Microsoft Windows 10 1809
Microsoft
2001512419.8
13Microsoft Windows Server 2016
Microsoft
1871310819.8
14Microsoft Windows 10 21h2
Microsoft
172911419.8
15Microsoft Windows 10 1607
Microsoft
1731310219.8
16Microsoft Windows 10 22h2
Microsoft
171911319.8
17Microsoft Windows Server 2012
Microsoft
170139419.8
18Apple macOS
Apple
26102208.8
19Apple macOS Golden Gate
Apple
27401208.8
20Mozilla Firefox
Mozilla
24741009.6
21Mozilla Firefox ESR
Mozilla
2073909.6
22Apple iPadOS
Apple
1960908.8
23Apple Ios
Apple
1950908.8
24TOTOLINK X2000r
TOTOLINK
3030009.1
25Amazon AWS
Amazon
41932210

Most affected vendors

  1. 1.Microsoft1,323 vulnerabilities, 62 critical, 1 exploited
  2. 2.Oracle988 vulnerabilities, 66 critical, 0 exploited
  3. 3.Linux971 vulnerabilities, 0 critical, 0 exploited
  4. 4.Google792 vulnerabilities, 13 critical, 2 exploited
  5. 5.IBM240 vulnerabilities, 29 critical, 0 exploited
  6. 6.Adobe171 vulnerabilities, 31 critical, 0 exploited
  7. 7.Apache334 vulnerabilities, 15 critical, 0 exploited
  8. 8.Apple392 vulnerabilities, 0 critical, 0 exploited
  9. 9.Mozilla270 vulnerabilities, 4 critical, 0 exploited
  10. 10.Dell110 vulnerabilities, 14 critical, 0 exploited

Most severe vulnerabilities

How this is built

Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.

Technologies are ranked by a score: 10 points for each vulnerability exploited in the wild, 5 for each critical, 2 for each high and 1 for every vulnerability. A vulnerability counts once for every technology it affects, so one advisory can appear under several products.

The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.

Use this data

The same data is at https://junglewise.ai/threats/monthly/2026-10.json, and this page as text at https://junglewise.ai/threats/monthly/2026-10.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.

Cite as: Junglewise Threat Intelligence, "Most vulnerable technologies in October 2026", https://junglewise.ai/threats/monthly/2026-10, 2 November 2026.