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CVE-2021-45556

No known exploitation. EPSS puts it in the 69th percentile. Fixed versions are out.

CVSS 3.17.5HighEPSS percentile69th1.2% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix5 products3 fixed builds listed below

Published Updated Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

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

  • Netgear Gs108tv2 FirmwareAffected: < 5.4.2.36Upgrade to: 5.4.2.36Stated by: NVD
  • Netgear Gs110tpp FirmwareAffected: < 7.0.7.2Upgrade to: 7.0.7.2Stated by: NVD
  • Netgear Gs110tpv2 FirmwareAffected: < 5.4.2.36Upgrade to: 5.4.2.36Stated by: NVD
  • Netgear Gs308t FirmwareAffected: < 1.0.3.2Upgrade to: 1.0.3.2Stated by: NVD
  • Netgear Gs110tpv3 FirmwareAffected: < 7.0.7.2Upgrade to: 7.0.7.2Stated by: NVD

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

Certain NETGEAR devices are affected by command injection by an authenticated user. This affects GS108Tv2 before 5.4.2.36, GS110TPP before 7.0.7.2, GS110TPv2 before 5.4.2.36., GS110TPv3 before 7.0.7.2, GS308T before 1.0.3.2, GS310TP before 1.0.3.2, GS724TPP before 2.0.6.3, GS724TPv2 before 2.0.6.3, GS728TPPv2 before 6.0.8.2, GS728TPv2 before 6.0.8.2, GS752TPP before 6.0.8.2, GS752TPv2 before 6.0.8.2, MS510TXM before 1.0.4.2, and MS510TXUP before 1.0.4.2.

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.

EPSS69th
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

1.2% chance of exploitation activity in the next 30 days, which ranks it in the 69th percentile of scored CVEs.

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

Lifecycle

5 events over 1061 days, from the signal feeds we watch.

  1. Patch availablerecord updated
  2. Publishedweakness classified, att&ck mapped

Affected products

And 21 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

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

Scored 7.5 by NVD.

How it is reached

  • Attack Vector AdjacentRequires access to the local network (e.g. same Wi-Fi, Bluetooth)
  • Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
  • Privileges Required HighRequires admin or elevated privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope ChangedThe exploit can affect other components (e.g. sandbox escape, host compromise from VM)

Impact if exploited

  • Confidentiality LowSome restricted information is disclosed, but limited in scope
  • 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.

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We'll flag the next CVE, public exploit or patch for Gs108tv2 Firmware, not every advisory.