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CVE-2014-7857

31
FAUCET Score

CVE-2014-7857 is a critical authentication bypass vulnerability affecting various D-Link NAS devices, including the DNS-320L, DNS-327L, and others. This flaw allows remote attackers to gain administrator privileges by manipulating a specific CGI command and setting a crafted session cookie. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with low complexity and no user interaction, leading to complete compromise of confidentiality, integrity, and availability. While not currently listed on the KEV catalog or having public exploit code in Metasploit or ExploitDB, it has received community discussion and media coverage, indicating awareness of its severity.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.00b07CPE matchmatch criteria
cpe:2.3:o:d-link:dns-322l_firmware:*:*:*:*:*:*:*:*
<= 1.05b03CPE matchmatch criteria
cpe:2.3:o:d-link:dns-325_firmware:*:*:*:*:*:*:*:*
<= 1.03b06CPE matchmatch criteria
cpe:2.3:o:d-link:dns-345_firmware:*:*:*:*:*:*:*:*
<= 1.02b01CPE matchmatch criteria
cpe:2.3:o:d-link:dns-320b_firmware:*:*:*:*:*:*:*:*
<= 1.40b03CPE matchmatch criteria
cpe:2.3:o:d-link:dnr-326_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
15.17%
Probability of exploitation in next 30 days
EPSS Percentile
96.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.1517 is in the 92nd percentile among its peer group of 36,829 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

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

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/132075/D-Link-Bypass-Buffer-Overflow.html
Third Party AdvisoryVDB Entry
seclists.org / fulldisclosure/2015/May/125
Mailing ListThird Party AdvisoryVDB Entry
search-lab.hu / media/D-Link_Security_advisory_3_0_public.pdf
Technical Description
securityfocus.com / archive/1/535626/100/200/threaded
securityfocus.com / bid/74880
Third Party AdvisoryVDB Entry