CVE-2026-71922 (GCVE-0-2026-71922)
Vulnerability from cvelistv5 – Published: 2026-08-24 17:07 – Updated: 2026-08-24 18:52
VLAI
EPSS
VEX
Title
DrayTek VigorSwitch Multiple Models Pre-Authentication NULL Pointer Dereference via setget.cgi
Summary
Multiple DrayTek VigorSwitch models contain a pre-authentication null pointer dereference vulnerability in the setget.cgi interface. The vulnerability is caused by missing validation when the pass field is absent. A remote attacker can trigger this vulnerability via a crafted request to crash the service and cause a denial of service.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-24 18:52 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.draytek.com/about/security-advisory/m… | vendor-advisory |
| https://www.vulncheck.com/advisories/draytek-vigo… | third-party-advisory |
Impacted products
28 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| DrayTek Corporation | VigorSwitch G2540xs |
Affected:
0 , < 3.9.10
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch P2540xs |
Affected:
0 , < 3.9.10
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch FX2120 |
Affected:
0 , < 3.9.10
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch G2282x |
Affected:
0 , < 2.10.6
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch P2282x |
Affected:
0 , < 2.10.6
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch Q2300x |
Affected:
0 , < 2.10.7
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch PQ2300xb |
Affected:
0 , < 2.10.7
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch G2542x |
Affected:
0 , < 3.10.6
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch P2542x |
Affected:
0 , < 3.10.6
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch P2542xh |
Affected:
0 , < 3.10.6
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch PX2060 |
Affected:
0 , < 2.9.10
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch G1280 |
Affected:
0 , < 2.9.10
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch P1280 |
Affected:
0 , < 2.9.10
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch P1281x |
Affected:
0 , < 2.9.10
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch G1282 |
Affected:
0 , < 2.9.10
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch P1282 |
Affected:
0 , < 2.9.10
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch G2121 |
Affected:
0 , < 2.9.10
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch P2121 |
Affected:
0 , < 2.9.10
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch PQ2121x |
Affected:
0 , < 2.9.10
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch Q2121x |
Affected:
0 , < 2.9.10
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch G2280x |
Affected:
0 , < 2.9.10
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch P2280x |
Affected:
0 , < 2.9.10
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch Q2200x |
Affected:
0 , < 2.9.10
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch PQ2200xb |
Affected:
0 , < 2.9.10
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch G2100 |
Affected:
0 , < 2.9.10
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch P2100 |
Affected:
0 , < 2.9.10
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch G2540x |
Affected:
0 , < 2.9.10
(custom)
|
guessed | |
| DrayTek Corporation | VigorSwitch P2540x |
Affected:
0 , < 2.9.10
(custom)
|
guessed |
Date Public
2026-08-24 00:00
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}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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