CVE-2026-814338.7HighCWE-120
CVE-2026-81433: Fireware OS Pre-Authentication Stack Buffer Overflow in fingerd Allows Remote Code Execution
WatchGuard · Fireware OS
Vendor fix available · Affected: WatchGuard Fireware OS · Exploitation: not established
ExploitationNot established
Not in CISA KEV as of catalogue 2026.11.13 (13 Nov)
- In CISA KEV: not seen
- Exploited (reported): not seen
- Scanning observed: not seen
- Proof of concept public: not seen
- Not establishedNothing in the sources we check
0.2%probability of exploitation in the next 30 days
10th percentile
050100
Higher than 10% of scored CVEs
8.7HighCVSS 4.0
LowMediumHighCrit.
DescriptionNVD
A stack-based buffer overflow vulnerability in WatchGuard Fireware OS's DHCP fingerprinting daemon (fingerd) allows an unauthenticated attacker with adjacent network access to execute arbitrary code or crash the process by sending a specially crafted DHCP packet.
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- WatchGuard
- Published
- September 2026
Coverage1 article · 1 outlet
First in our coverage: SecurityOnline, 30 Sep.
- WatchGuard Patches Firebox Flaws Enabling Unauthenticated Remote Code ExecutionSecurityOnline · first in our coverage · mentions it in passing
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