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CVE-2020-8437

30
FAUCET Score

CVE-2020-8437 describes a denial-of-service vulnerability in BitTorrent uTorrent through version 3.5.5 (build 45505), stemming from a flaw in its bencoding parser when handling nested dictionaries. This vulnerability carries a high CVSS score of 7.5, indicating it can be exploited remotely with low attack complexity to cause a complete denial of service. While there is no evidence of active exploitation, no public exploit code, and minimal community discussion, its high EPSS and FAUCET Risk Score suggest a non-trivial potential for impact.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.5.5CPE matchmatch criteria
cpe:2.3:a:bittorrent:utorrent:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
12.04%
Probability of exploitation in next 30 days
EPSS Percentile
95.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1204 is in the 93rd percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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

Remediation records are not available for this CVE.

References

blog.whtaguy.com / 2020/09/utorrent-cve-2020-8437-vulnerability.html
ExploitThird Party Advisory
forum.utorrent.com / forum/13-announcements
Vendor Advisory
twitter.com / va_start
Third Party Advisory
utclient.utorrent.com / offers/beta_release_notes/release_notes.html
Release NotesVendor Advisory