Technology · Cisco
Cisco IOS vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 69 vulnerabilities in Cisco IOS: 0 in the last 7 days and 1 in the last 90 days, 60 of them critical and 60 exploited in the wild. The most recent, CVE-2008-4128, was published on 13 July 2026.
- Last 7 days
- 0
- Last 90 days
- 1
- Critical, all time
- 60
- Exploited in the wild
- 60
About Cisco IOS
A proprietary operating system used on Cisco Systems routers and network switches.
Latest Cisco IOS vulnerabilities
- CVE-2008-4128: Cisco IOS CSRF in HTTP Administration componentcriticalexploited in the wildCVSS 9.3EPSS 12.0%
- CVE-2023-41974: Apple iOS and iPadOS use-after-free in kernelcriticalexploited in the wildCVSS 7.8EPSS 0.2%
- CVE-2025-20352: Cisco IOS and IOS XE stack overflow in SNMP subsystemcriticalexploited in the wildCVSS 7.7EPSS 3.6%
- CVE-2025-43300: Apple iOS, iPadOS, and macOS out-of-bounds write in Image I/Ocriticalexploited in the wildCVSS 10EPSS 4.5%
- CVE-2025-24200: Apple iOS and iPadOS Incorrect Authorization Vulnerabilitycriticalexploited in the wildCVSS 6.1
- CVE-2023-20109: Cisco IOS and IOS XE Group Encrypted Transport VPN Out-of-Bounds Write Vulnerabilitycriticalexploited in the wildCVSS 6.6
- CVE-2023-42824: Apple iOS and iPadOS Kernel Privilege Escalation Vulnerabilitycriticalexploited in the wildCVSS 7.8
- CVE-2023-41061: Apple iOS, iPadOS, and watchOS Wallet Code Execution Vulnerabilitycriticalexploited in the wildCVSS 7.8
- CVE-2023-41064: Apple iOS, iPadOS, and macOS ImageIO Buffer Overflow Vulnerabilitycriticalexploited in the wildCVSS 7.8
- CVE-2016-6415: Cisco IOS, IOS XR, and IOS XE IKEv1 Information Disclosure Vulnerabilitycriticalexploited in the wildCVSS 7.5
- CVE-2004-1464: Cisco IOS Denial-of-Service Vulnerabilitycriticalexploited in the wildCVSS 5.9
- CVE-2017-6742: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2023-28206: Apple iOS, iPadOS, and macOS IOSurfaceAccelerator Out-of-Bounds Write Vulnerabilitycriticalexploited in the wildCVSS 8.6
- CVE-2021-30900: Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerabilitycriticalexploited in the wildCVSS 7.8
- CVE-2022-42856: Apple iOS Type Confusion Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2022-42827: Apple iOS and iPadOS Out-of-Bounds Write Vulnerabilitycriticalexploited in the wildCVSS 7.8
- CVE-2022-32917: Apple iOS, iPadOS, and macOS Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 7.8
- CVE-2020-9934: Apple iOS, iPadOS, and macOS Input Validation Vulnerabilitycriticalexploited in the wildCVSS 5.5
- CVE-2021-31010: Apple iOS, macOS, watchOS Sandbox Bypass Vulnerabilitycriticalexploited in the wildCVSS 7.5
- CVE-2022-32893: Apple iOS and macOS Out-of-Bounds Write Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2022-32894: Apple iOS and macOS Out-of-Bounds Write Vulnerabilitycriticalexploited in the wildCVSS 7.8
- CVE-2021-30983: Apple iOS and iPadOS Buffer Overflow Vulnerabilitycriticalexploited in the wildCVSS 7.8
- CVE-2016-4656: Apple iOS Memory Corruption Vulnerabilitycriticalexploited in the wildCVSS 7.8
- CVE-2016-4657: Apple iOS Webkit Memory Corruption Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2016-4655: Apple iOS Information Disclosure Vulnerabilitycriticalexploited in the wildCVSS 5.5
Most severe Cisco IOS vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2025-43300: Apple iOS, iPadOS, and macOS out-of-bounds write in Image I/Ocriticalexploited in the wildCVSS 10EPSS 4.5%
- CVE-2017-3881: Cisco IOS and IOS XE Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2018-0151: Cisco IOS Software and Cisco IOS XE Software Quality of Service Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2017-12240: Cisco IOS and IOS XE Software DHCP Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2022-22587: Apple Memory Corruption Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2018-0171: Cisco IOS and IOS XE Software Smart Install Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 9.8
- CVE-2008-4128: Cisco IOS CSRF in HTTP Administration componentcriticalexploited in the wildCVSS 9.3EPSS 12.0%
- CVE-2017-6742: Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2022-42856: Apple iOS Type Confusion Vulnerabilitycriticalexploited in the wildCVSS 8.8
- CVE-2022-32893: Apple iOS and macOS Out-of-Bounds Write Vulnerabilitycriticalexploited in the wildCVSS 8.8
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 1 | 1 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
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.
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/technologies/ios.json, 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, "Cisco IOS vulnerabilities", https://junglewise.ai/threats/technologies/ios, 26 September 2026.