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CRITICAL severity

CVE-2020-36514 — Acc Reader

CRITICAL

CVE-2020-36514 is a critical-severity (CVSS 9.8) CWE-908 vulnerability in acc_reader_project acc reader. No vendor fix is recorded yet; mitigation options are listed below.

An issue was discovered in the acc_reader crate through 2020-12-27 for Rust. fill_buf may read from uninitialized memory locations.

Published
Updated
Affected
1 product
Patched
See advisory
Exploits
None indexed
Exploitation data as of Oct 2, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs67th percentile — riskier than 67% of all scored CVEsHighest risk
0.00%0.56%1.13%1.69%0.4%1.2%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2020-36514 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Description

An issue was discovered in the acc_reader crate through 2020-12-27 for Rust. fill_buf may read from uninitialized memory locations.

Affected Products

1 product · 1 configurations
Application
acc readeracc_reader_project
≤ 2.0.0
range

Detection & mitigation playbook

Vendor / appliance
  1. Detect

    Inventory every acc_reader_project acc reader deployment and check each version against the affected-products list above.

  2. Remediation status

    No patch has shipped for CVE-2020-36514 yet — track the acc_reader_project acc reader advisory for a fixed release and apply the workarounds below in the meantime.

  3. Mitigate without a patch

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.

Frequently Asked Questions

An issue was discovered in the acc_reader crate through 2020-12-27 for Rust. fill_buf may read from uninitialized memory locations.
O3 Security · Runtime Protection

Is CVE-2020-36514 being exploited in your environment?

Detect and block the exploit chain at execution, on systems you cannot patch yet.

CVE-2020-36514: Acc Reader (Critical 9.8)