CVE-2020-8437

HIGH

BitTorrent uTorrent < 3.5.5 - Denial of Service via Bencoding Parser

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2020-8437. PoCs published by mavlevin.

AI-analyzed exploit summary The repository contains only a README with minimal information about CVE-2020-8437, lacking any exploit code or technical details. It appears to be a placeholder without functional content.

Description

The bencoding parser in BitTorrent uTorrent through 3.5.5 (build 45505) misparses nested bencoded dictionaries, which allows a remote attacker to cause a denial of service.

Exploits (2)

nomisec STUB 11 stars
by mavlevin · poc
https://github.com/mavlevin/uTorrent-CVE-2020-8437

The repository contains only a README with minimal information about CVE-2020-8437, lacking any exploit code or technical details. It appears to be a placeholder without functional content.

Classification
Stub 90%
Attack Type
Other
Complexity
Trivial
Reliability
Theoretical
Target: uTorrent
No auth needed
devstral-2 · analyzed Feb 18, 2026 Full analysis →
inthewild STUB
poc
https://github.com/guywhataguy/utorrent-cve-2020-8437

The repository contains only a minimal README with no exploit code or technical details. It claims to be an exploit for CVE-2020-8437 but lacks any functional content.

Classification
Stub 90%
Attack Type
Other
Complexity
Trivial
Reliability
Theoretical
Target: uTorrent
No auth needed
devstral-2 · analyzed Feb 23, 2026 Full analysis →

References (4)

Core 4
Core References
Vendor Advisory x_refsource_misc
https://forum.utorrent.com/forum/13-announcements/
Third Party Advisory x_refsource_misc
https://twitter.com/va_start
Release Notes, Vendor Advisory x_refsource_confirm
https://utclient.utorrent.com/offers/beta_release_notes/release_notes.html

Scores

CVSS v3 7.5
EPSS 0.1816
EPSS Percentile 95.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-476
Status published
Products (1)
bittorrent/utorrent < 3.5.5
Published Mar 02, 2020
Tracked Since Feb 18, 2026