CVE-2013-3656

NONECVSS 0.0Trending — 3 sources updated this week

0.0

Cybozu Office 9.1.0 and earlier does not properly manage sessions, which allows remote attackers to bypass authentication by leveraging knowledge of a login URL.

CVSS v3: —
EG Score: 0.0(none)
EPSS: 49.2%
KEV: Not listed

Published

July 20, 2013

Last Modified

April 29, 2026

References (8)

vultures@jpcerthttp://jvn.jp/en/jp/JVN19491840/index.html
vultures@jpcerthttp://jvndb.jvn.jp/jvndb/JVNDB-2013-000069
vultures@jpcerthttp://products.cybozu.co.jp/office/ver9/download/update/fix910.html
vultures@jpcerthttps://exchange.xforce.ibmcloud.com/vulnerabilities/85894
af854a3a-2127-422b-91ae-364da2661108http://jvn.jp/en/jp/JVN19491840/index.html
af854a3a-2127-422b-91ae-364da2661108http://jvndb.jvn.jp/jvndb/JVNDB-2013-000069
af854a3a-2127-422b-91ae-364da2661108http://products.cybozu.co.jp/office/ver9/download/update/fix910.html
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/85894

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-287Improper Authentication

Data Freshness Timeline

(refreshed 15× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:10 UTCepss_batch
2026-06-02 20:10 UTCepss_batch
2026-06-01 13:49 UTCepss_batch
2026-06-01 13:49 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-28 23:13 UTCEG score recompute
2026-05-28 23:13 UTCGHSA enrichment
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-26 07:16 UTCepss_batch

Frequently asked(4)

What is CVE-2013-3656?

CVE-2013-3656 is a none vulnerability published on July 20, 2013. Cybozu Office 9.1.0 and earlier does not properly manage sessions, which allows remote attackers to bypass authentication by leveraging knowledge of a login URL.

When was CVE-2013-3656 disclosed?

CVE-2013-3656 was first published in the National Vulnerability Database on July 20, 2013, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2013-3656 actively exploited?

CVE-2013-3656 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 49.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2013-3656?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2013-3656, 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.

Dependency Blast Radius

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CVE-2013-3656

📅 Published

🔄 Last Modified

🔗 References (8)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(4)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2013-3656?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (8)

Frequently asked(4)

Related CVEs(same CWE)