8.8High
CVE-2026-92748
BC Security Empire before 6.7.1 fails to validate the multipart filename parameter in upload endpoints, allowing authenticated operators to write files to arbitrary paths on the C2 server. Attackers can use path traversal sequences in the filename to bypass directory containment and write malicious files to sensitive locations for code execution.
What this means for your business
- An attacker can use it remotely, over a network, with an ordinary user login, and without anyone at your company clicking anything.
What to do
- 1Ask your IT team or provider whether any of your systems use the affected product.
- 2If you do, follow the vendor's guidance. No patch reference has been published yet.
Not sure if your company is exposed?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 8.8 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- CVSS v4
- 8.7
- Weakness
- CWE-22
- Assigned by
- disclosure@vulncheck.com
Dates
- Published
- 2026-09-16
- Last modified
- 2026-09-18
- Sources
- NVD
References
- https://github.com/BC-SECURITY/Empire
- https://github.com/BC-SECURITY/Empire/blob/v6.6.0/empire/server/core/download_service.py#L148-L193
- https://github.com/BC-SECURITY/Empire/commit/c33a626316cb20bc8ed707e03a22d324d5d4762a
- https://github.com/BC-SECURITY/Empire/issues/824
- https://github.com/BC-SECURITY/Empire/releases/tag/v6.7.1
- https://www.vulncheck.com/advisories/bc-security-empire-before-6.7.1-path-traversal-file-upload-rce