CVE-2015-5685

The lazy_bdecode function in BitTorrent DHT bootstrap server (bootstrap-dht ) allows remote attackers to execute arbitrary code via a crafted packet, related to "improper indexing."

Published: 2015-08-13 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-5685 is rated Moderate Risk (61/100): CVSS High severity, with high exploitation likelihood (EPSS 5.51%, 92th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2015-5685

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 6.61% 5.51% -1.10%
2 2025-10-04 4.98% 6.61% +1.63%
3 2025-03-30 — 4.98% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-5685

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2015-5685

OS Trackers for CVE-2015-5685

vendor priority summary link
debian not yet assigned CVE-2015-5685 not yet assigned priority: Debian including 1 source packages (libtorrent-rasterbar), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2015-5685
ubuntu medium CVE-2015-5685 medium priority: Ubuntu including 1 source packages (libtorrent-rasterbar), 14 status rows across 14 suites (bionic, focal, groovy, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 12, needed 1, released 1. https://ubuntu.com/security/CVE-2015-5685

Affected software / configurations for CVE-2015-5685

Vendor Product Version Raw CPE
bittorrent bootstrap-dht — cpe:2.3:a:bittorrent:bootstrap-dht:-:*:*:*:*:*:*:*

References for CVE-2015-5685

cvelogic Threat Intelligence