A heap-based buffer overflow vulnerability exists in the Fireware OS authentication service allows an attacker who…
WatchGuard · Fireware OS
A heap-based buffer overflow in the authentication service of WatchGuard's Fireware OS can be triggered by a crafted response from the configured Active Directory server. Exploitation requires an attacker who controls or intercepts traffic to that server, and the attacker can cause a denial of service or potentially execute arbitrary code, with no authentication or user interaction needed.
A heap-based buffer overflow vulnerability exists in the Fireware OS authentication service allows an attacker who controls or intercepts traffic to the configured Active Directory server to create a denial of service condition and potentially execute arbitrary code by returning a specially crafted response.
- Exploited
- Not confirmed
- Reports
- 0
- Tactics
- 0/15
Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
Disclosed on 27 Oct 2026. No public exploit code or confirmed exploitation is recorded.
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
No techniques linkedNo ATT&CK techniques are linked to this CVE yet. MITRE CTID has not mapped it, and no report passage in the corpus ties it to a technique.
What security researchers reported
Not named in any threat report yetAlso mentioned in 2 community threat pulses (AlienVault OTX)
Weaker evidencePulses are indicator collections that anyone can publish. A mention is not confirmation of exploitation.
- Known_Cve | Oct 30, 2026 | Part 2/229 Oct 2026
- Known_Cve | Oct 29, 2026 | Part 3/328 Oct 2026