VulnSocial

CVE-2021-35036(zyxel / ax7501-b0)

LOWCVSS 6.5 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

A cleartext storage of information vulnerability in the Zyxel VMG3625-T50B firmware version V5.50(ABTL.0)b2k could allow an authenticated attacker to obtain sensitive information from the configuration file.

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0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-312

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Are you affected?

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

  • ax7501-b0
  • ax7501-b0_firmware
  • dx3301-t0
  • dx3301-t0_firmware

Threat summary

  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Peaked 1d ago at 1 mentions (2026-05-22); latest day: 1
  • 2 total mentions across 2 days

Affected systems

Vendors
zyxel
Products
ax7501-b0ax7501-b0_firmwaredx3301-t0dx3301-t0_firmwaredx5401-b0dx5401-b0_firmwareemg3525-t50bemg3525-t50b_firmwareemg5523-t50bemg5523-t50b_firmware

1 version affected across 62 products

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-05-22: 1Mentions · 2026-05-23: 105-2205-23
Referenced assets2 URLs
Full discourse2 posts
  • Nicolas Krassas@Dinosn

    Zyxel super-admin credential leak expanded from one router image to CPE/ONT/LTE/5G devices + password gen algorithm. https://minanagehsalalma.github.io/zyxel-cve-2021-35036-super-admin-password-leak/?1

    1301893.5K
    158.6K followersView on X
  • Nicolas Krassas@Dinosn

    Zyxel low-priv account leaked super-admin, FTPS, and TR-069 secrets across router fleets https://minanagehsalalma.github.io/zyxel-cve-2021-35036-super-admin-password-leak/

    000541.3K
    158.6K followersView on X
CPE platform detail64 entries

64 of 64 entries

PartVendorProductVersionTarget SWTarget HW
HWzyxelax7501-b0---
OSzyxelax7501-b0_firmware---
HWzyxeldx3301-t0---
OSzyxeldx3301-t0_firmware---
HWzyxeldx5401-b0---
OSzyxeldx5401-b0_firmware---
HWzyxelemg3525-t50b---
OSzyxelemg3525-t50b_firmware---
HWzyxelemg5523-t50b---
OSzyxelemg5523-t50b_firmware---
HWzyxelemg5723-t50k---
OSzyxelemg5723-t50k_firmware---
HWzyxelep240p---
OSzyxelep240p_firmware---
HWzyxelex5401-b0---
OSzyxelex5401-b0_firmware---
HWzyxelex5501-b0---
OSzyxelex5501-b0_firmware---
HWzyxellte3301-plus---
OSzyxellte3301-plus_firmware---
HWzyxellte5388-m804---
OSzyxellte5388-m804_firmware---
HWzyxellte5388-s905---
OSzyxellte5388-s905_firmware---
HWzyxellte5398-m904---
OSzyxellte5398-m904_firmware---
HWzyxellte7240-m403---
OSzyxellte7240-m403_firmware---
HWzyxellte7461-m602---
OSzyxellte7461-m602_firmware---
HWzyxellte7480-m804---
OSzyxellte7480-m804_firmware---
HWzyxellte7480-s905---
OSzyxellte7480-s905_firmware---
HWzyxellte7485-s905---
OSzyxellte7485-s905_firmware---
HWzyxellte7490-m804---
OSzyxellte7490-m804_firmware---
HWzyxelnr5101---
OSzyxelnr5101_firmware---
HWzyxelnr7101---
OSzyxelnr7101_firmware---
HWzyxelnr7102---
OSzyxelnr7102_firmware---
HWzyxelpm7300-t0---
OSzyxelpm7300-t0_firmware---
HWzyxelpmg5317-t20b---
OSzyxelpmg5317-t20b_firmware---
HWzyxelpmg5617-t20b2---
OSzyxelpmg5617-t20b2_firmware---
HWzyxelpmg5617ga---
OSzyxelpmg5617ga_firmware---
HWzyxelpmg5622ga---
OSzyxelpmg5622ga_firmware---
HWzyxelvmg3625-t50b---
OSzyxelvmg3625-t50b_firmware---
OSzyxelvmg3625-t50b_firmware---
OSzyxelvmg3625-t50b_firmware---
HWzyxelvmg3927-t50k---
OSzyxelvmg3927-t50k_firmware---
HWzyxelvmg8623-t50b---
OSzyxelvmg8623-t50b_firmware---
HWzyxelvmg8825-t50k---
OSzyxelvmg8825-t50k_firmware---

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