The STARTTLS implementation in WatchGuard XCS 9.0 and 9.1 does not properly restrict I/O…
Priority LOW 38CWE-264Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-264.
Summary
The STARTTLS implementation in WatchGuard XCS 9.0 and 9.1 does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted SMTP sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack, a similar issue to CVE-2011-0411.
Why it matters now
EPSS 0.05156 92nd 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 · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:watchguard:xcs:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | WatchGuard |
| cpe:2.3:a:watchguard:xcs:9.1:*:*:*:*:*:*:* | 9.1 | Vulnerable | WatchGuard |
- cpe:2.3:a:watchguard:xcs:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·WatchGuard
- cpe:2.3:a:watchguard:xcs:9.1:*:*:*:*:*:*:* Versions 9.1 Vulnerable ·WatchGuard
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2011-2165
- 2026-10-03 Alias added: GHSA-7445-q6fm-5g46
References
More WatchGuard Xcs vulnerabilities
- TI-2015-04587 Watchguard XCS 9.2 and 10.0 before build 150522 allow remote authenticated users to… CVSS 2.0MEDIUM 6.5
- TI-2015-04586 SQL injection vulnerability in Watchguard XCS 9.2 and 10.0 before build 150522 allows… CVSS 2.0HIGH 7.5
Sources
- CVE-2011-2165 · CVE Program
- CVE-2011-2165 · NVD
- FIRST EPSS
- GHSA-7445-q6fm-5g46 · GitHub Advisory Database · CC BY 4.0
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