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CVE-2015-4407

18
FAUCET Score

CVE-2015-4407 describes a buffer overflow vulnerability affecting Hikvision NVR DS-76xxNI-E1/2 and DS-77xxxNI-E4 devices running firmware versions prior to 3.4.0. This flaw allows remote authenticated users to trigger a denial of service by sending a specially crafted HTTP request, leading to service interruption. Rated with a CVSS score of 6.5 (Medium), the vulnerability has a network attack vector, low attack complexity, and its primary impact is high availability loss. There is no evidence of active exploitation, nor are there known public exploits or Metasploit modules available, though it has received some community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.3.4CPE matchmatch criteria
cpe:2.3:o:hikvision:ds-76xxx_series_firmware:*:*:*:*:*:*:*:*
<= 3.3.4CPE matchmatch criteria
cpe:2.3:o:hikvision:ds-77xxx_series_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.28%
Probability of exploitation in next 30 days
EPSS Percentile
67.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0128 is in the 81st percentile among its peer group of 21,958 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

hikvision.com / En/Press-Release-details_435_i1023.html
PatchVendor Advisory