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CVE-2020-36451

26
FAUCET Score

CVE-2020-36451 describes a critical vulnerability in the rcu_cell Rust crate, specifically affecting versions through 2020-11-14, due to unconditional implementations of Send and Sync for RcuCell<T>. This flaw carries a high CVSS score of 8.1, indicating a severe risk with network-based attacks possible with high attack complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. Despite its severity, there is currently no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2020-11-14CPE matchmatch criteria
cpe:2.3:a:rcu_cell_project:rcu_cell:*:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.25%
Probability of exploitation in next 30 days
EPSS Percentile
66.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0125 is in the 27th percentile among its peer group of 8,915 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

rustpatch availablevia ghsa
Product: rcu_cellFixed in: 0.1.9

Vendor Advisories (1)

rustGHSA-686h-j8r8-wmfmhigh

Data races in rcu_cell

Aug 25, 2021

References

raw.githubusercontent.com / rustsec/advisory-db/main/crates/rcu_cell/RUSTSEC-2020-0131.md
Third Party Advisory
rustsec.org / advisories/RUSTSEC-2020-0131.html
ExploitPatchThird Party Advisory