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CVE-2016-7835

30
FAUCET Score

CVE-2016-7835 is a critical use-after-free vulnerability affecting H2O, specifically dena h2o and h2o_project h2o. This flaw allows remote attackers to trigger a denial-of-service (DoS) and potentially exfiltrate server certificate private keys or other sensitive information. With a CVSS score of 9.1, it presents a high-impact threat that can be exploited over the network with low attack complexity and no user interaction. Despite its severity, 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
<= 2.0.4CPE matchmatch criteria
cpe:2.3:a:dena:h2o:*:*:*:*:*:*:*:*
2.1.0CPE matchmatch criteria
cpe:2.3:a:h2o_project:h2o:2.1.0:beta3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.1CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.18%
Probability of exploitation in next 30 days
EPSS Percentile
80.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0218 is in the 70th percentile among its peer group of 36,821 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / h2o/h2o/issues/1144
PatchThird Party Advisory
jvn.jp / en/jp/JVN44566208/index.html
Third Party AdvisoryVDB Entry
securityfocus.com / bid/95061
Third Party AdvisoryVDB Entry