The official znc docker images before 1.7.1-slim contain a blank password for a root user.
Priority MEDIUM 47Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
The official znc docker images before 1.7.1-slim contain a blank password for a root user. Systems using the znc docker container deployed by affected versions of the Docker image may allow an remote attacker to achieve root access with a blank password.
Why it matters now
EPSS 0.02322 83rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 11
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:znc:znc_docker_image:1.6:*:*:*:*:*:*:* | 1.6 | Vulnerable | znc |
| cpe:2.3:a:znc:znc_docker_image:1.6-slim:*:*:*:*:*:*:* | 1.6-slim | Vulnerable | znc |
| cpe:2.3:a:znc:znc_docker_image:1.6.4:*:*:*:*:*:*:* | 1.6.4 | Vulnerable | znc |
| cpe:2.3:a:znc:znc_docker_image:1.6.4-slim:*:*:*:*:*:*:* | 1.6.4-slim | Vulnerable | znc |
| cpe:2.3:a:znc:znc_docker_image:1.6.5:*:*:*:*:*:*:* | 1.6.5 | Vulnerable | znc |
| cpe:2.3:a:znc:znc_docker_image:1.6.5-slim:*:*:*:*:*:*:* | 1.6.5-slim | Vulnerable | znc |
| cpe:2.3:a:znc:znc_docker_image:1.6.6:*:*:*:*:*:*:* | 1.6.6 | Vulnerable | znc |
| cpe:2.3:a:znc:znc_docker_image:1.6.6-slim:*:*:*:*:*:*:* | 1.6.6-slim | Vulnerable | znc |
| cpe:2.3:a:znc:znc_docker_image:1.7.0:*:*:*:*:*:*:* | 1.7.0 | Vulnerable | znc |
| cpe:2.3:a:znc:znc_docker_image:1.7.0-slim:*:*:*:*:*:*:* | 1.7.0-slim | Vulnerable | znc |
- cpe:2.3:a:znc:znc_docker_image:1.6:*:*:*:*:*:*:* Versions 1.6 Vulnerable ·znc
- cpe:2.3:a:znc:znc_docker_image:1.6-slim:*:*:*:*:*:*:* Versions 1.6-slim Vulnerable ·znc
- cpe:2.3:a:znc:znc_docker_image:1.6.4:*:*:*:*:*:*:* Versions 1.6.4 Vulnerable ·znc
- cpe:2.3:a:znc:znc_docker_image:1.6.4-slim:*:*:*:*:*:*:* Versions 1.6.4-slim Vulnerable ·znc
- cpe:2.3:a:znc:znc_docker_image:1.6.5:*:*:*:*:*:*:* Versions 1.6.5 Vulnerable ·znc
- cpe:2.3:a:znc:znc_docker_image:1.6.5-slim:*:*:*:*:*:*:* Versions 1.6.5-slim Vulnerable ·znc
- cpe:2.3:a:znc:znc_docker_image:1.6.6:*:*:*:*:*:*:* Versions 1.6.6 Vulnerable ·znc
- cpe:2.3:a:znc:znc_docker_image:1.6.6-slim:*:*:*:*:*:*:* Versions 1.6.6-slim Vulnerable ·znc
- cpe:2.3:a:znc:znc_docker_image:1.7.0:*:*:*:*:*:*:* Versions 1.7.0 Vulnerable ·znc
- cpe:2.3:a:znc:znc_docker_image:1.7.0-slim:*:*:*:*:*:*:* Versions 1.7.0-slim Vulnerable ·znc
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-29577
- 2026-10-03 Alias added: GHSA-66fh-7c2j-p86h
References
Sources
- CVE-2020-29577 · CVE Program
- CVE-2020-29577 · NVD
- FIRST EPSS
- GHSA-66fh-7c2j-p86h · GitHub Advisory Database · CC BY 4.0
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