CVE-2021-42911

View on CVE.org

Published Mar 29, 2022 CVSS 3.1 · 9.8 Critical EPSS 3.5% KEV · Not listed

Description

A Format String vulnerability exists in DrayTek Vigor 2960 <= 1.5.1.3, DrayTek Vigor 3900 <= 1.5.1.3, and DrayTek Vigor 300B <= 1.5.1.3 in the mainfunction.cgi file via a crafted HTTP message containing malformed QUERY STRING, which could let a remote malicious user execute arbitrary code.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

AND

cpe:2.3:o:draytek:vigor2960_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:draytek:vigor2960:-:*:*:*:*:*:*:*

Configuration 2 [-]

AND

cpe:2.3:o:draytek:vigor3900_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:draytek:vigor3900:-:*:*:*:*:*:*:*

Configuration 3 [-]

AND

cpe:2.3:o:draytek:vigor300b_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:draytek:vigor300b:-:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

Exploit prediction score: 3.5% (3.524% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://gist.github.com/Cossack9989/e9c1c2d2e69b773ca4251acdd77f2835

History

No history.

Subscriptions

Draytek Vigor2960 Vigor2960 Firmware Vigor300b Vigor300b Firmware Vigor3900 Vigor3900 Firmware

Weaknesses

CWE-134

Sources

CVE record Updated: Aug 4, 2024, 3:47 AM

Status: PUBLISHED
Assigner: mitre
Published: Mar 29, 2022, 7:30 PM
Updated: Aug 4, 2024, 3:47 AM
Reserved: Oct 25, 2021, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 4:10 AM

Status: Modified
Published: Mar 29, 2022, 8:15 PM
Modified: Jun 17, 2026, 4:10 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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