CVE-2020-8437
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 12.0%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 12.04% probability · 96th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- bittorrent/utorrent
- Source
- cve@mitre.org
EPSS 12.0% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://blog.whtaguy.com/2020/09/utorrent-cve-2020-8437-vulnerability.htmlExploit, Third Party Advisory
- https://forum.utorrent.com/forum/13-announcements/Vendor Advisory
- https://twitter.com/va_startThird Party Advisory
- https://utclient.utorrent.com/offers/beta_release_notes/release_notes.htmlRelease Notes, Vendor Advisory
- https://blog.whtaguy.com/2020/09/utorrent-cve-2020-8437-vulnerability.htmlExploit, Third Party Advisory
- https://forum.utorrent.com/forum/13-announcements/Vendor Advisory
- https://twitter.com/va_startThird Party Advisory
- https://utclient.utorrent.com/offers/beta_release_notes/release_notes.htmlRelease Notes, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.