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CVE-2025-4883

23
FAUCET Score

CVE-2025-4883 is a critical stack-based buffer overflow vulnerability in the D-Link DI-8100 16.07.26A1 router firmware, specifically within the ctxz_asp function of the /ctxz.asp component. This flaw can be triggered remotely by manipulating connection limit parameters (def/defTcp/defUdp/defIcmp/defOther). With a CVSS score of 7.2 (High), successful exploitation could lead to high impact on confidentiality, integrity, and availability. While the exploit has been publicly disclosed, there is no evidence of active exploitation, nor are there Metasploit or Nuclei modules available, and community discussion is minimal.

Impacted Technologies

VendorProductVersion(s)CPE
16.07.26a1CPE matchmatch criteria
cpe:2.3:o:dlink:di-8100g_firmware:16.07.26a1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

8.6HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
HIGH
User Interaction
NONE
VS Confidentiality
HIGH
VS Integrity
HIGH
VS Availability
HIGH
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
5.37%
Probability of exploitation in next 30 days
EPSS Percentile
91.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0537 is in the 91st percentile among its peer group of 5,537 CVEs.

Social Chatter

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

github.com / Yhuanhuan01/DI-8100_Vulnerability_Report/blob/main/DI-8100-Vulnerability_Report_ctxz.md
ExploitThird Party Advisory
vuldb.com
Permissions RequiredThird Party AdvisoryVDB Entry
vuldb.com
Third Party AdvisoryVDB Entry
vuldb.com
Third Party AdvisoryVDB Entry
dlink.com
Product