Is CVE-2011-2778 actively exploited?

No active exploitation of CVE-2011-2778 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2011-2778 be exploited remotely?

Yes. CVE-2011-2778 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2011-2778?

CVE-2011-2778 has a CVSS score of 7.6 (HIGH).

HOME VULNERABILITIESCVE-2011-2778

HIGH

CVE-2011-2778

CWE-119Published: December 23, 2011· Updated: Jun 16, 2026

7.6

CVSS v3.1

Official Description

Multiple heap-based buffer overflows in Tor before 0.2.2.35 allow remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code by (1) establishing a SOCKS connection to SocksPort or (2) leveraging a SOCKS proxy configuration.

NVD Source

Technical Analysis

CVE-2011-2778 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.