Out-of-bounds Read in Bishopfox Sliver
CVE-2026-102507
Sliver C2 framework version 1.7.7 and earlier contains an unhandled panic vulnerability in the operator gRPC handler that allows an attacker controlling a compromised implant to crash the entire teamserver by returning a malformed or empty Download response. Attackers can send zero-length or 1-3 byte data payloads through a hostile implant session to trigger an out-of-bounds slice access in the vendored Binject library's BinaryMagic function, which propagates unrecovered through the operator gRPC interceptor chain and terminates the server process, affecting all connected operators.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/h00die/sliver_1.7.7_DoS (technical-description, exploit)
- www.vulncheck.com/advisories/sliver-denial-of-service-via-pe-parser-slice-bound… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-102507?
- CVE-2026-102507 is a medium-severity vulnerability in Bishopfox Sliver, classified under Out-of-bounds Read. CVSS score: 5.7/10. Published 2026-09-29.
- How severe is CVE-2026-102507?
- Medium severity. CVSS v3 base score is 5.7 out of 10.