CVE-2018-16870

MEDIUMNVD 5.95.9—Trending — 3 sources updated this week

5.9

It was found that wolfssl before 3.15.7 is vulnerable to a new variant of the Bleichenbacher attack to perform downgrade attacks against TLS. This may lead to leakage of sensible data.

CVSS v3: 5.9
EG Score: 5.9(medium)
EPSS: 40.2%
KEV: Not listed

Published

January 3, 2019

Last Modified

November 21, 2024

References (4)

secalert@redhathttp://cat.eyalro.net/
secalert@redhathttps://github.com/wolfSSL/wolfssl/pull/1950
af854a3a-2127-422b-91ae-364da2661108http://cat.eyalro.net/
af854a3a-2127-422b-91ae-364da2661108https://github.com/wolfSSL/wolfssl/pull/1950

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 18× 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 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:49 UTCepss_batch
2026-05-31 22:29 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
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 23:45 UTCEG score recompute
2026-05-27 23:45 UTCGHSA enrichment
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2018-16870?

CVE-2018-16870 is a medium vulnerability published on January 3, 2019. It was found that wolfssl before 3.15.7 is vulnerable to a new variant of the Bleichenbacher attack to perform downgrade attacks against TLS. This may lead to leakage of sensible data.

When was CVE-2018-16870 disclosed?

CVE-2018-16870 was first published in the National Vulnerability Database on January 3, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-16870 actively exploited?

CVE-2018-16870 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 40.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-16870?

CVE-2018-16870 has a CVSS v3 base score of 5.9 (NVD).

How do I remediate CVE-2018-16870?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-16870, 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-2018-16870

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(2)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-16870?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)