OpenSSL in Apple Mac OS X 10.6.x before 10.6.5 does not properly perform arithmetic, which allows remote attackers to bypass X.509 certificate authentication via an arbitrary certificate issued by a legitimate Certification Authority.
CVE-2010-1378
CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence
Score 9.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-02. NVD baseline CVSS 9.8; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 9.8
- EG Score
- 9.8(medium)
- EPSS
- 66.3%
- KEV
- Not listed
Published
November 15, 2010
Last Modified
April 29, 2026
References (4)
- product-security@applehttp://lists.apple.com/archives/security-announce/2010//Nov/msg00000.html
- product-security@applehttp://support.apple.com/kb/HT4435
- af854a3a-2127-422b-91ae-364da2661108http://lists.apple.com/archives/security-announce/2010//Nov/msg00000.html
- af854a3a-2127-422b-91ae-364da2661108http://support.apple.com/kb/HT4435
Data Freshness Timeline
(refreshed 6× in last 7d / 40× 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.
- 2026-07-06 02:19 UTCEPSS rescore
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- 2026-05-20 07:54 UTCEG score recompute
- 2026-05-20 07:54 UTCGHSA enrichment
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Frequently asked(5)
What is CVE-2010-1378?
CVE-2010-1378 is a critical vulnerability published on November 15, 2010. OpenSSL in Apple Mac OS X 10.6.x before 10.6.5 does not properly perform arithmetic, which allows remote attackers to bypass X.509 certificate authentication via an arbitrary certificate issued by a legitimate Certification Authority.
When was CVE-2010-1378 disclosed?
CVE-2010-1378 was first published in the National Vulnerability Database on November 15, 2010, 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-2010-1378 actively exploited?
CVE-2010-1378 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 66.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2010-1378?
CVE-2010-1378 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2010-1378?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2010-1378, 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
Explore the affected products and dependency analysis for CVE-2010-1378
Is Your Infrastructure Affected by CVE-2010-1378?
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