CVE-2026-93740: A vulnerability was identified in Totolink A3002MU Hh-B20211125.1046

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CRITICAL 10.0REMOTE

CVE-2026-93740 is a critical-severity flaw (CVSS 10.0) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was identified in Totolink A3002MU Hh-B20211125.1046. Affected is the function formWlEncrypt of the file /boafrm/formWlEncrypt. The manipulation of the argument submit-url leads to buffer overflow. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.

Why this priority

Critical severity
CISA SSVC: public proof of concept
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 41%)
CISA exploited list	No
Weakness	CWE-119, CWE-120
Published	2026-09-18
Last modified	2026-09-21

Publisher (CNA): VulDB

Last updated 2026-09-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-09-18 22:17 UTCPublished CVE record published
2026-09-21 16:17 UTCUpdated Record last modified

Exact fixes by distribution

Fedora 46 · fio · FIXED · 3.43-2.fc46 · FEDORA-2026-b36219886b · source

sudo dnf upgrade --advisory=FEDORA-2026-b36219886b

Fedora ELN · weston · FIXED · 16.0.2-1.eln159 · FEDORA-2026-b98ccaa6a0 · source

sudo dnf upgrade --advisory=FEDORA-2026-b98ccaa6a0

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/ToTolink/A3002MU/bof-formWlEn

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-93740?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-93740 being exploited?

CVE-2026-93740 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-93740 affect?

CVE-2026-93740 affects affected software. Severity is critical (CVSS 10.0). A vulnerability was identified in Totolink A3002MU Hh-B20211125.1046. Affected is the function formWlEncrypt of the file /boafrm/formWlEncrypt. The manipulation of the argument submit-url leads to buffer overflow. It is possible to initiate

How urgent is CVE-2026-93740?

Priority 61/100. Critical severity; CISA SSVC: public proof of concept; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

References

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