CVE-2018-9129

Name: CVE-2018-9129
Creator: NVD / NIST
Published: 2018-08-15T18:29:01.23+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.97%

Last modified Jun 17, 2026

CVE-2018-9129 is a vulnerability of currently unknown severity. ZyXEL ZyWALL/USG series devices have a Bleichenbacher vulnerability in their Internet Key Exchange (IKE) handshake implementation used for IPsec based VPN connections.. EPSS estimates a 0.97% chance of exploitation in the next 30 days.

Description

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

Metrics

EPSS Probability

0.97%

57.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Zyxel	Zywall 110 Firmware	All versions
Zyxel	Zywall 1100 Firmware	All versions
Zyxel	Zywall 310 Firmware	All versions
Zyxel	Zywall Vpn 50 Firmware	All versions
Zyxel	Zywall Vpn 100 Firmware	All versions
Zyxel	Zywall Vpn 300 Firmware	All versions
Zyxel	Usg 20w Firmware	All versions
Zyxel	Usg 40 Firmware	All versions
Zyxel	Usg 40w Firmware	All versions
Zyxel	Usg 60 Firmware	All versions
Zyxel	Usg 60w Firmware	All versions
Zyxel	Usg 110 Firmware	All versions
Zyxel	Usg 2200-Vpn Firmware	All versions
Zyxel	Usg 310 Firmware	All versions
Zyxel	Usg 1100 Firmware	All versions
Zyxel	Usg 1900 Firmware	All versions
Zyxel	Usg 20w-Vpn Firmware	All versions

References

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.shtmlPatch, Vendor Advisory
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.shtmlPatch, Vendor Advisory

Timeline

Published: Aug 15, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-9129?

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

How severe is CVE-2018-9129?

Severity scoring for CVE-2018-9129 is pending analysis. The EPSS model estimates a 0.97% probability of exploitation in the next 30 days.

How do I fix CVE-2018-9129?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-9129?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST