CVE-2015-3644

NONECVSS 0.0

0.0

Stunnel 5.00 through 5.13, when using the redirect option, does not redirect client connections to the expected server after the initial connection, which allows remote attackers to bypass authentication.

CVSS v3: —
EG Score: 0.0(none)
EPSS: 48.3%
KEV: Not listed

Published

May 14, 2015

Last Modified

May 6, 2026

References (8)

cve@mitrehttp://www.debian.org/security/2015/dsa-3299
cve@mitrehttp://www.securityfocus.com/bid/74659
cve@mitrehttp://www.securitytracker.com/id/1032324
cve@mitrehttps://www.stunnel.org/CVE-2015-3644.html
af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2015/dsa-3299
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/74659
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1032324
af854a3a-2127-422b-91ae-364da2661108https://www.stunnel.org/CVE-2015-3644.html

Data Freshness Timeline

(refreshed 9× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:14 UTCEPSS rescore
2026-06-07 15:22 UTCEPSS rescore
2026-06-07 07:20 UTCOSV refresh
2026-06-06 13:45 UTCEPSS rescore
2026-06-05 22:44 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:09 UTCEPSS rescore
2026-06-02 20:10 UTCEPSS rescore
2026-06-02 20:10 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 00:14 UTCEPSS rescore
2026-05-29 13:41 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore

Frequently asked(4)

What is CVE-2015-3644?

CVE-2015-3644 is a none vulnerability published on May 14, 2015. Stunnel 5.00 through 5.13, when using the redirect option, does not redirect client connections to the expected server after the initial connection, which allows remote attackers to bypass authentication.

When was CVE-2015-3644 disclosed?

CVE-2015-3644 was first published in the National Vulnerability Database on May 14, 2015, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2015-3644 actively exploited?

CVE-2015-3644 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 48.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2015-3644?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-3644, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2015-3644

📅 Published

🔄 Last Modified

🔗 References (8)