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CVE-2015-2688

22
FAUCET Score

CVE-2015-2688 is a denial-of-service vulnerability affecting Tor versions before 0.2.4.26 and 0.2.5.11. It allows remote attackers to crash the Tor daemon by sending crafted packets that exploit improper handling of unexpected buffer arrival times with invalid layouts. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low complexity, leading to a complete loss of availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.2.4.26CPE matchmatch criteria
cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
>= 0.2.5.1, < 0.2.5.11CPE matchmatch criteria
cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*

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
2.19%
Probability of exploitation in next 30 days
EPSS Percentile
80.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0219 is in the 65th 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

lists.torproject.org / pipermail/tor-talk/2015-March/037281.html
Mailing ListVendor Advisory
trac.torproject.org / projects/tor/ticket/15083
PatchVendor Advisory