Threat Intelligence / CVE / CVE-2026-2129

CVE-2026-2129 — Dlink Dir-823x Firmware 250416

CVSS v3.1 7.2 (HIGH) · CVSS v4.0 7.3 · EPSS 0.1% (higher than 29.9% of all scored CVEs) · Priority 4.8/10 · Published 2026-02-08

As of 2026-02-11, CVE-2026-2129 is a HIGH-severity vulnerability in Dlink Dir-823x Firmware 250416, CVSS v3.1 7.2, EPSS 0.1% (29.9th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-2129, most recently “CVE-2025-29635 — Mirai Variant Campaign Recruiting D-Link DIR-823X Routers via /goform/set_prohibiting Command Injection”.

Last updated: 2026-02-11

What is CVE-2026-2129?

A vulnerability was found in D-Link DIR-823X 250416. Affected by this issue is some unknown functionality of the file /goform/set_ac_status. Performing a manipulation of the argument ac_ipaddr/ac_ipstatus/ap_randtime results in os command injection. The attack may be initiated remotely. The exploit has been made public and could be used.

The record classifies CVE-2026-2129 under weakness classes CWE-77, CWE-78. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs high-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 2 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 217 days ago.

Severity and exploitation probability

CVSS v3.1 base score
7.2 — HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0 base score
7.3
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:P/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
EPSS (FIRST)
0.1% probability of exploitation in the next 30 days, higher than 29.9% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
4.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-02-08, last modified 2026-02-11

Is CVE-2026-2129 being exploited?

It currently carries a trending score of 12 in the Threadlinqs vulnerability feed.

Affected products and versions

How to fix CVE-2026-2129

Vendor advisory: https://www.dlink.com/. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

Threat activity tracking CVE-2026-2129

1 tracked threat in the Threadlinqs corpus references CVE-2026-2129, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Seeded from nvd and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.

Full detection coverage & IOCs for threats exploiting CVE-2026-2129 are available via the Threadlinqs MCP server (Purple tier). View plans →

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