CVE-2018-4012
An exploitable buffer overflow vulnerability exists in the HTTP header-parsing function of the Webroot BrightCloud SDK.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.55%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An exploitable buffer overflow vulnerability exists in the HTTP header-parsing function of the Webroot BrightCloud SDK. The function bc_http_read_header incorrectly handles overlong headers, leading to arbitrary code execution. An unauthenticated attacker could impersonate a remote BrightCloud server to trigger this vulnerability.
- CVSS 3.0
- 8.1 HIGHCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.55% probability · 85th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- webroot/brightcloud
- Source
- talos-cna@cisco.com
EPSS 2.5% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0683Exploit, Third Party Advisory
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0683Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.