A stack-based buffer overflow vulnerability in WatchGuard Fireware OS's DHCP fingerprinting daemon (fingerd) allows an unauthenticated attacker with… (CVE-2026-81433)
A stack-based buffer overflow vulnerability exists in the DHCP fingerprinting daemon (fingerd) of WatchGuard Fireware OS. This flaw allows an unauthenticated attacker with adjacent network access to execute arbitrary code or cause a denial of service by crashing the process via a specially crafted DHCP packet. The vulnerability is identified as CVE-2026-81433 and is classified as high severity. No affected versions or patch information are provided, and no known exploits are reported in the wild.
AI Analysis
Technical Summary
CVE-2026-81433 is a stack-based buffer overflow vulnerability in the DHCP fingerprinting daemon (fingerd) component of WatchGuard Fireware OS. An attacker with access to the adjacent network can send a malicious DHCP packet to trigger the overflow, potentially leading to arbitrary code execution or process crash. The vulnerability requires no authentication and has high impact on confidentiality, integrity, and availability. No patch or remediation details are currently available.
Potential Impact
Successful exploitation can result in arbitrary code execution or denial of service by crashing the DHCP fingerprinting daemon. This compromises system stability and potentially allows attacker control over the affected device. The vulnerability affects the confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the DHCP fingerprinting daemon from untrusted adjacent networks to reduce exposure.
A stack-based buffer overflow vulnerability in WatchGuard Fireware OS's DHCP fingerprinting daemon (fingerd) allows an unauthenticated attacker with… (CVE-2026-81433)
Description
A stack-based buffer overflow vulnerability exists in the DHCP fingerprinting daemon (fingerd) of WatchGuard Fireware OS. This flaw allows an unauthenticated attacker with adjacent network access to execute arbitrary code or cause a denial of service by crashing the process via a specially crafted DHCP packet. The vulnerability is identified as CVE-2026-81433 and is classified as high severity. No affected versions or patch information are provided, and no known exploits are reported in the wild.
CVSS v4.0
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-81433 is a stack-based buffer overflow vulnerability in the DHCP fingerprinting daemon (fingerd) component of WatchGuard Fireware OS. An attacker with access to the adjacent network can send a malicious DHCP packet to trigger the overflow, potentially leading to arbitrary code execution or process crash. The vulnerability requires no authentication and has high impact on confidentiality, integrity, and availability. No patch or remediation details are currently available.
Potential Impact
Successful exploitation can result in arbitrary code execution or denial of service by crashing the DHCP fingerprinting daemon. This compromises system stability and potentially allows attacker control over the affected device. The vulnerability affects the confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the DHCP fingerprinting daemon from untrusted adjacent networks to reduce exposure.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-h8f9-rp2r-962g
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-81433"]
- Database Specific Severity
- HIGH
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6abc5d3f680226ef6899ba42
Added to database: 09/30/2026, 00:52:15 UTC
Last enriched: 09/30/2026, 01:21:20 UTC
Last updated: 09/30/2026, 03:03:33 UTC
Views: 5
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