In Alpine before 2.25, untagged responses from an IMAP server are accepted before STARTTLS.
Priority LOW 30CWE-77Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Code execution
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-77.
Summary
In Alpine before 2.25, untagged responses from an IMAP server are accepted before STARTTLS.
Why it matters now
EPSS 0.01558 75th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
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 · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:alpine_project:alpine:*:*:*:*:*:*:*:* | before 2.25 | Vulnerable | Alpine Project |
- cpe:2.3:a:alpine_project:alpine:*:*:*:*:*:*:*:* Versions before 2.25 Vulnerable ·Alpine Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-38370
- 2026-10-03 Alias added: GHSA-2c2h-qvww-cw95
References
More Alpine Project Alpine vulnerabilities
- TI-2022-07606 URL access filters bypass in Alpine CVSS 3.1HIGH 7.5
- TI-2020-11740 Alpine before 2.23 silently proceeds to use an insecure connection after a /tls is sent… CVSS 3.1HIGH 7.5
- TI-2022-07607 Authentication bypass in Alpine CVSS 3.1MEDIUM 6.5
- TI-2021-21535 Alpine before 2.25 allows remote attackers to cause a denial of service (application… CVSS 3.1MEDIUM 5.9
Sources
- CVE-2021-38370 · CVE Program
- CVE-2021-38370 · NVD
- FIRST EPSS
- GHSA-2c2h-qvww-cw95 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences