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CVE-2015-4409

18
FAUCET Score

CVE-2015-4409 is a buffer overflow vulnerability affecting Hikvision NVR DS-76xxNI-E1/2 and DS-77xxxNI-E4 series devices running firmware versions prior to 3.4.0. An authenticated remote attacker can exploit this flaw by sending a crafted HTTP request, leading to a denial of service (service interruption) due to the device crashing. With a CVSS score of 6.5 (Medium), this vulnerability is relatively easy to exploit remotely with low attack complexity, requiring prior authentication but resulting in high impact to 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
<= 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 21,974 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