ZyXEL ZyWALL/USG series devices have a Bleichenbacher vulnerability in their Internet Key Exchange (IKE) handshake implementation used for IPsec based VPN connections
Published Aug 15, 2018
5.9
MEDIUMCVSS 3.0
EPSS 0.97%
Description
ZyXEL ZyWALL/USG series devices have a Bleichenbacher vulnerability in their Internet Key Exchange (IKE) handshake implementation used for IPsec based VPN connections.
Affected products
No data.
Configuration 1
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Running on/with
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Configuration 2
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Configuration 3
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Configuration 4
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Configuration 5
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Configuration 6
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Configuration 7
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Configuration 8
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Configuration 9
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Configuration 10
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Configuration 11
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Configuration 12
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Configuration 13
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Configuration 14
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Configuration 15
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Configuration 16
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Configuration 17
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No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
AV:N/AC:M/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.97% (0.00965) | 60.36th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.97% (0.00965) | 60.19th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.15% (0.00147) | 51.17th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.15% (0.00147) | 50.02th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.14% (0.00140) | 47.96th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00954) | 16.28th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.83% (0.00833) | 24.58th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.83% (0.00833) | 0.00th | v1 |
No CWE recorded.
References (3)
- ftp://ftp.zyxel.com/USG110/firmware/USG110_4.32%28AAPH.0%29C0_2.pdf x_refsource_CONFIRM
- https://web-in-security.blogspot.com/2018/08/practical-bleichenbacher-attacks-on-ipsec-ike.html x_refsource_MISCThird Party Advisory
- https://www.zyxel.com/support/bleichenbacher_attack_vulnerability.shtml x_refsource_CONFIRMPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| ftp://ftp.zyxel.com/USG110/firmware/USG110_4.32%28AAPH.0%29C0_2.pdf | x_refsource_CONFIRM | |
| https://web-in-security.blogspot.com/2018/08/practical-bleichenbacher-attacks-on-ipsec-ike.html | x_refsource_MISCThird Party Advisory | |
| https://www.zyxel.com/support/bleichenbacher_attack_vulnerability.shtml | x_refsource_CONFIRMPatchVendor Advisory |
Change history (0)
No recorded changes yet.