CVE Tools
Track your stack

CVE-2026-71937

DrayTek VigorSwitch Multiple Models Buffer Overflow via poe_schedule_profile

No known exploitation. EPSS puts it in the 53rd percentile. Fixed versions are out.

CVSS 3.17.2HighEPSS percentile53rd0.7% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix5 products2 fixed builds listed below
Check it yourself

No ready-made check. Neither Nuclei nor OpenVAS has one for this CVE yet.

Request a scan

Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • DrayTek Corporation VigorSwitch G2540xsAffected: < 3.9.10Upgrade to: 3.9.10Stated by: CVE record
  • DrayTek Corporation VigorSwitch P2540xsAffected: < 3.9.10Upgrade to: 3.9.10Stated by: CVE record
  • DrayTek Corporation VigorSwitch FX2120Affected: < 3.9.10Upgrade to: 3.9.10Stated by: CVE record
  • DrayTek Corporation VigorSwitch G2282xAffected: < 2.10.6Upgrade to: 2.10.6Stated by: CVE record
  • DrayTek Corporation VigorSwitch P2282xAffected: < 2.10.6Upgrade to: 2.10.6Stated by: CVE record

Versions as the sources state them. 23 more products have version data. Full version matrix after sign-in

Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

Multiple DrayTek VigorSwitch models contain a buffer overflow vulnerability in the poe_schedule_profile function. The vulnerability is caused by repeated concatenation of the start_date, start_time, duration_time, how_often, weekdays, monthly_date, and cycle_duration fields into small fixed-size buffers without proper length checks. A remote attacker can trigger this vulnerability via crafted input, causing a denial of service or potentially executing arbitrary commands. Exploitation requires valid administrative credentials for the device's web management interface.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS53rd
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

0.7% chance of exploitation activity in the next 30 days, which ranks it in the 53rd percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

6 events over 49 days, from the signal feeds we watch.

  1. Record updated
  2. Record updated
  3. Publishedweakness classified, att&ck mapped, record updated

Affected products

And 20 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Scored 7.2 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required HighRequires admin or elevated privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

Watch the software you run.

My Stack ranks new CVEs for your products by real-world exploitation, so the next serious one reaches you without reading every advisory.

We'll flag the next CVE, public exploit or patch for VigorSwitch G2540xs, not every advisory.