CVE-2026-4212Disclosure(dlink / dnr-202l)

MEDIUMCVSS 9.8 · CRITICAL

Exploit discussion active in current signal (1 latest mentions)

Immediate actions

  • Prioritize remediation for dlink dnr-202l systems immediately
  • Hunt for exploitation attempts and persistence artifacts
  • Increase monitoring for publicly documented tradecraft
  • Track advisory updates for patch or workaround availability

Recommended action window: High priority (within 72h)

NVD description

A security vulnerability has been detected in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323, DNS-325, DNS-326, DNS-327L, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05 and DNS-1550-04 up to 20260205. This affects the function Downloads_Schedule_Info of the file /cgi-bin/download_mgr.cgi. Such manipulation leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed publicly and may be used.

4.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-119CWE-121CWE-787

Priority

MEDIUM

Exploitation

NONE

PoC

YES

Patch

NONE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • dnr-202l
  • dnr-202l_firmware
  • dnr-326
  • dnr-326_firmware

Threat summary

  • Public PoC and exploit tooling are both present
  • 5 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Exploit tool or code specified in 1 signal
  • PoC mentioned or linked in 1 signal
  • Technical details provided in 3 signals
  • Disclosure: 3 classified signals
  • General: 1 classified signal
  • Peaked 1d ago at 4 mentions (2026-03-16); latest day: 1
  • 5 total mentions across 2 days

Affected systems

Vendors
Products
dnr-202ldnr-202l_firmwarednr-326dnr-326_firmwaredns-1100-4dns-1100-4_firmwaredns-120dns-1200-05dns-1200-05_firmwaredns-120_firmware

1 version affected across 40 products

Deep dive

Activity timeline5 mentions / 2d
01234Mentions · 2026-03-16: 4Mentions · 2026-03-17: 1PoC Mentioned / Linked · 2026-03-16: 1Exploit Tool / Code · 2026-03-16: 1Technical Details · 2026-03-16: 303-1603-17
Signal classification3 categories
Disclosure
360.0%
Exploit
120.0%
General
120.0%
Referenced assets10 URLs
Classification over time
DateTotalLabels
2026-03-164
Disclosure2Exploit1General1
2026-03-171
Disclosure1
Full discourse5 posts
  • CVE@CVEnew
    Disclosure

    CVE-2026-4212 A security vulnerability has been detected in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323, DNS-325, DNS-326, DNS-327L, … https://www.cve.org/CVERecord?id=CVE-2026-4212

    Post summary

    The statement announces that CVE-2026-4212 has been detected in multiple D-Link devices and links to the official CVE record.

    00000159
    56.7K followersView on X
  • CVEFind.com@CveFindCom
    Disclosure

    [CVE-2026-4212: HIGH] Critical alert: Security flaw in multiple D-Link NAS devices! Vulnerability in download manager can allow remote stack-based buffer overflow attacks. Stay secure!#cve,CVE-2026-4212,#cybersecurity https://cvefind.com/CVE-2026-4212

    Post summary

    An alert announcing a stack‑based buffer overflow vulnerability in multiple D‑Link NAS devices; the post lacks evidence of PoC, exploit code, active attacks, or patch details.

    0000037
    601 followersView on X
  • The Hacker Wire@TheHackerWire
    General

    🟠 CVE-2026-4212 - High A security vulnerability has been detected in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323, DNS-325, DNS-326, DNS-327L, DNR-326, DNS-340L, DNS-3... https://www.thehackerwire.com/vulnerability/CVE-2026-4212/ https://t.co/yko18Q4lW6

    Post summary

    The tweet announces detection of a high‑severity vulnerability (CVE‑2026‑4212) affecting multiple D‑Link devices, linking to an external site for details, but offers no further technical, exploit, or patch information.

    0000033
    136 followersView on X
  • dbugs@ptdbugs
    Exploit

    D-Link DNS-1550-04 download_mgr.cgi Downloads_Schedule_Info stack-based overflow CVE: CVE-2026-4212 Vendor: D-link Product: DNS-120 CVSS: 8.7 Credits: pjqwudi (VulDB User) Description: A security vulnerability has been detected in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323, DNS-325, DNS-326, DNS-327L, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05 and DNS-1550-04 up to 20260205. This affects the function Downloads_Schedule_Info of the file /cgi-bin/download_mgr.cgi. Such manipulation leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed publicly and may be used. References: • https://dbugs.ptsecurity.com/vulnerability/CVE-2026-4212 • https://vuldb.com/?id.351123 • https://vuldb.com/?ctiid.351123 • https://vuldb.com/?submit.770442 • https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_161/161.md • https://www.dlink.com/ #dbugs_vuln

    Post summary

    The post details a stack‑buffer overflow in D‑Link DNS‑120 firmware (CVE‑2026‑4212), providing public references and a GitHub link that likely hosts PoC code, while not confirming any active exploitation.

    0000097
    612 followersView on X
  • CyberDudeBivash® | Global Cybersecurity Company@cyberbivash
    Disclosure

    🚨 CYBERDUDEBIVASH SENTINEL APEX ALERT 🚨 Threat: CVE-2026-4212 - D-Link DNS-1550-04 download_mgr.cgi Downloads_Schedule_Info stack-based overflow Intel Report: https://ift.tt/2p8Ld5a

    Post summary

    An alert announces CVE‑2026‑4212, a stack-based overflow in D-Link DNS‑1550‑04’s download_mgr.cgi. No PoC, exploit code, patch, or evidence of active exploitation is provided.

    0000049
    335 followersView on X
CPE platform detail40 entries

40 of 40 entries

PartVendorProductVersionTarget SWTarget HW
HWdlinkdnr-202l---
OSdlinkdnr-202l_firmware---
HWdlinkdnr-326---
OSdlinkdnr-326_firmware---
HWdlinkdns-1100-4---
OSdlinkdns-1100-4_firmware---
HWdlinkdns-120---
HWdlinkdns-1200-05---
OSdlinkdns-1200-05_firmware---
OSdlinkdns-120_firmware---
HWdlinkdns-1550-04---
OSdlinkdns-1550-04_firmware---
HWdlinkdns-315l---
OSdlinkdns-315l_firmware---
HWdlinkdns-320---
OSdlinkdns-320_firmware---
HWdlinkdns-320l---
OSdlinkdns-320l_firmware---
HWdlinkdns-320lw---
OSdlinkdns-320lw_firmware---
HWdlinkdns-321---
OSdlinkdns-321_firmware---
HWdlinkdns-322l---
OSdlinkdns-322l_firmware---
HWdlinkdns-323---
OSdlinkdns-323_firmware---
HWdlinkdns-325---
OSdlinkdns-325_firmware---
HWdlinkdns-326---
OSdlinkdns-326_firmware---
HWdlinkdns-327l---
OSdlinkdns-327l_firmware---
HWdlinkdns-340l---
OSdlinkdns-340l_firmware---
HWdlinkdns-343---
OSdlinkdns-343_firmware---
HWdlinkdns-345---
OSdlinkdns-345_firmware---
HWdlinkdns-726-4---
OSdlinkdns-726-4_firmware---

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