Home/CVE/ZyXEL ZyWALL/USG series devices have a Bleichenbacher vulnerability in their Internet Key Exchange (IKE) handshake imple
CVE

CVE-2018-9129

ZyXEL ZyWALL/USG series devices have a Bleichenbacher vulnerability in their Internet Key Exchange (IKE) handshake imple

ZyXEL ZyWALL/USG series devices have a Bleichenbacher vulnerability in their Internet Key Exchange (IKE) handshake implementation used for IPsec based VPN connections.

MEDIUM · CVSS 5.9 EPSS 0.00273
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  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
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Affected Products & Versions

17
zyxel zywall 110 firmwareall versions
zyxel zywall 1100 firmwareall versions
zyxel zywall 310 firmwareall versions
zyxel zywall vpn 50 firmwareall versions
zyxel zywall vpn 100 firmwareall versions
zyxel zywall vpn 300 firmwareall versions
zyxel usg 20w firmwareall versions
zyxel usg 40 firmwareall versions
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Scoring & Timeline

5.9
MEDIUM · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD15 Aug 2018 · 06:29 PM
CVSS VectorCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
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References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
ftp://ftp.zyxel.com/USG110/firmware/USG110_4.32%28AAPH.0%29C0_2.pdf
https://web-in-security.blogspot.com/2018/08/practical-bleichenbacher-attacks-on-ipsec-ike.htmlThird Party Advisory
https://www.zyxel.com/support/bleichenbacher_attack_vulnerability.shtmlPatchVendor Advisory
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