---
id: CVE-2021-36512
title: >-
  An issue was discovered in function scanallsubs in src/sbbs3/scansubs.cpp in
  Synchronet BBS, which may allow attackers to view sensitive information due to
  an uninitialized value.
summary: >-
  An issue was discovered in function scanallsubs in src/sbbs3/scansubs.cpp in
  Synchronet BBS, which may allow attackers to view sensitive information due to
  an uninitialized value.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-908
vendor: synchro
product: bulletin_board_system
affected:
  - bulletin_board_system
published: '2021-10-19'
updated: '2026-07-05'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-36512'
references:
  - url: 'https://gitlab.synchro.net/main/sbbs/-/issues/276'
    label: cve@mitre.org
  - url: 'http://synchronet.com'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://gitlab.synchro.net/main/sbbs/-/issues/276'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00952
epssPercentile: 0.5968
ingestedAt: '2026-07-06T01:08:17.043Z'
---

## Overview

An issue was discovered in function scanallsubs in src/sbbs3/scansubs.cpp in Synchronet BBS, which may allow attackers to view sensitive information due to an uninitialized value.

## Affected

- `bulletin_board_system`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.