CVE-2022-30525 (GCVE-0-2022-30525)
Vulnerability from cvelistv5 – Published: 2022-05-12 13:05 – Updated: 2025-10-21 23:15Summary
A OS command injection vulnerability in the CGI program of Zyxel USG FLEX 100(W) firmware versions 5.00 through 5.21 Patch 1, USG FLEX 200 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 500 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 700 firmware versions 5.00 through 5.21 Patch 1, USG FLEX 50(W) firmware versions 5.10 through 5.21 Patch 1, USG20(W)-VPN firmware versions 5.10 through 5.21 Patch 1, ATP series firmware versions 5.10 through 5.21 Patch 1, VPN series firmware versions 4.60 through 5.21 Patch 1, which could allow an attacker to modify specific files and then execute some OS commands on a vulnerable device.
Severity
9.8 (Critical)
SSVC
Exploitation: active
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-01-29 16:09 UTC
CWE
- CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://www.zyxel.com/support/Zyxel-security-advi… | x_refsource_CONFIRM |
| http://packetstormsecurity.com/files/167176/Zyxel… | x_refsource_MISC |
| http://packetstormsecurity.com/files/167182/Zyxel… | x_refsource_MISC |
| http://packetstormsecurity.com/files/167372/Zyxel… | x_refsource_MISC |
| http://packetstormsecurity.com/files/168202/Zyxel… | x_refsource_MISC |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| Zyxel | USG FLEX 100(W) firmware |
Affected:
5.00 through 5.21 Patch 1
|
|
| Zyxel | USG FLEX 200 firmware |
Affected:
5.00 through 5.21 Patch 1
|
|
| Zyxel | USG FLEX 500 firmware |
Affected:
5.00 through 5.21 Patch 1
|
|
| Zyxel | USG FLEX 700 firmware |
Affected:
5.00 through 5.21 Patch 1
|
|
| Zyxel | ATP series firmware |
Affected:
5.10 through 5.21 Patch 1
|
|
| Zyxel | VPN series firmware |
Affected:
4.60 through 5.21 Patch 1
|
|
| Zyxel | USG FLEX 50(W) firmware |
Affected:
5.10 through 5.21 Patch 1
|
|
| Zyxel | USG 20(W)-VPN firmware |
Affected:
5.10 through 5.21 Patch 1
|
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 3add486a-bda5-4bf1-a6b5-171560183253
Exploited: Yes
Timestamps
First Seen: 2022-05-16
Asserted: 2022-05-16
Scope
Notes: Zyxel Multiple Firewalls OS Command Injection Vulnerability | Affected: Zyxel / Multiple Firewalls | Description: A command injection vulnerability in the CGI program of some Zyxel firewall versions could allow an attacker to modify specific files and then execute some OS commands on a vulnerable device. | Required action: Apply updates per vendor instructions. | Due date: 2022-06-06 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2022-30525
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-78 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | Multiple Firewalls |
| Due Date | 2022-06-06 |
| Date Added | 2022-05-16 |
| Vendorproject | Zyxel |
| Vulnerabilityname | Zyxel Multiple Firewalls OS Command Injection Vulnerability |
| Knownransomwarecampaignuse | Unknown |
References
Created: 2026-10-02 08:10 CEST
| Updated: 2026-10-02 08:10 CEST
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 300a55c2-7ffe-4646-8718-6d72eb139eec
Exploited: Yes
Timestamps
First Seen: 2022-05-16
Asserted: 2022-05-16
Scope
Notes: A OS command injection vulnerability in the CGI program of Zyxel USG FLEX 100(W) firmware versions 5.00 through 5.21 Patch 1, USG FLEX 200 firmware... | Affected: Zyxel / USG FLEX 100(W) firmware, USG FLEX 200 firmware, USG FLEX 500 firmware, USG FLEX 700 firmware, ATP series firmware, VPN series firmware, USG FLEX 50(W) firmware, USG 20(W)-VPN firmware | CVSS: 9.8 (CRITICAL) | EPSS: 0.99944 | Used in malware: unknown | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: previdian
Details
| Feed | Previdian (previdian.com) |
|---|---|
| Title | A OS command injection vulnerability in the CGI program of Zyxel USG FLEX 100(W) firmware versions 5.00 through 5.21 Patch 1, USG FLEX 200 firmware... |
| Cve Id | CVE-2022-30525 |
| Vendor | Zyxel |
| Ghsa Id | None |
| Product | USG FLEX 100(W) firmware, USG FLEX 200 firmware, USG FLEX 500 firmware, USG FLEX 700 firmware, ATP series firmware, VPN series firmware, USG FLEX 50(W) firmware, USG 20(W)-VPN firmware |
| Added Date | 2022-05-16T00:00:00.000Z |
| Cvss Score | 9.8 |
| Epss Score | 0.99944 |
| Previous Ids | |
| Cvss Severity | CRITICAL |
| Virtual Patch | False |
| Cvss Estimated | False |
| Epss Percentile | 0.99973 |
| Used In Malware | unknown |
| Vulnerability Id | CVE-2022-30525 |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-10-02 09:11 CEST
| Updated: 2026-10-02 09:11 CEST
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"url": "http://packetstormsecurity.com/files/167182/Zyxel-Firewall-ZTP-Unauthenticated-Command-Injection.html"
},
{
"tags": [
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],
"url": "http://packetstormsecurity.com/files/167372/Zyxel-USG-FLEX-5.21-Command-Injection.html"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "http://packetstormsecurity.com/files/168202/Zyxel-Firewall-SUID-Binary-Privilege-Escalation.html"
}
],
"x_legacyV4Record": {
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"ASSIGNER": "security@zyxel.com.tw",
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{
"name": "http://packetstormsecurity.com/files/168202/Zyxel-Firewall-SUID-Binary-Privilege-Escalation.html",
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"url": "http://packetstormsecurity.com/files/168202/Zyxel-Firewall-SUID-Binary-Privilege-Escalation.html"
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"cveId": "CVE-2022-30525",
"datePublished": "2022-05-12T13:05:11.000Z",
"dateReserved": "2022-05-10T00:00:00.000Z",
"dateUpdated": "2025-10-21T23:15:39.737Z",
"state": "PUBLISHED"
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"dataType": "CVE_RECORD",
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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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