CVE-2026-86133
published 2026-09-30CVE-2026-86133: An integer underflow vulnerability in the WatchGuard Fireware OS IKE daemon (iked) allows a remote attacker who has completed the initial IKEv2 handshake to…
PriorityP343high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.34%
25.3th percentile
An integer underflow vulnerability in the WatchGuard Fireware OS IKE daemon (iked) allows a remote attacker who has completed the initial IKEv2 handshake to crash the iked process by sending a specially crafted encrypted IKEv2 message, resulting in a denial of service.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| watchguard | fireware | >= 12.0 < 12.5.21 | 12.5.21 |
| watchguard | fireware | >= 12.12 < 12.12.3 | 12.12.3 |
| watchguard | fireware | >= 2025.0 < 2026.2.3 | 2026.2.3 |
| watchguard | fireware | >= 2026.3 < 2026.3.2 | 2026.3.2 |
| watchguard | fireware_os | >= 12.0 < 12.12.3 | 12.12.3 |
| watchguard | fireware_os | >= 12.0 < 12.5.21 | 12.5.21 |
| watchguard | fireware_os | >= 2025.0 < 2026.2.3 | 2026.2.3 |
| watchguard | fireware_os | >= 2026.3 < 2026.3.2 | 2026.3.2 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv4.08.2HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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VulDB
WatchGuard Fireware OS IKE daemon integer underflow
vuldb·2026-09-30·CVSS 8.2
CVE-2026-86133 [HIGH] WatchGuard Fireware OS IKE daemon integer underflow
A vulnerability was found in WatchGuard Fireware OS. It has been rated as critical. This affects an unknown part of the component IKE daemon. Performing a manipulation results in integer underflow.
This vulnerability is identified as CVE-2026-86133. The attack can be initiated remotely. There is not any exploit available.
GHSA
An integer underflow vulnerability in the WatchGuard Fireware OS IKE daemon (iked) allows a remote attacker who has completed the initial IKEv2 handshake to crash the iked process by sending a special
ghsa_unreviewed·2026-09-30
CVE-2026-86133 [HIGH] CWE-191 An integer underflow vulnerability in the WatchGuard Fireware OS IKE daemon (iked) allows a remote attacker who has completed the initial IKEv2 handshake to crash the iked process by sending a special
An integer underflow vulnerability in the WatchGuard Fireware OS IKE daemon (iked) allows a remote attacker who has completed the initial IKEv2 handshake to crash the iked process by sending a specially crafted encrypted IKEv2 message, resulting in a denial of service.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-09-30
Published