CVE-2018-18834

CRITICALNVD 9.89.8—

9.8

An issue has been found in libIEC61850 v1.3. It is a heap-based buffer overflow in BerEncoder_encodeOctetString in mms/asn1/ber_encoder.c.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 63.3%
KEV: Not listed

Published

October 30, 2018

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated May 28, 2026

No patch confirmed yet. Sources: github.

generic

Heap buffer overflow in function BerEncoder_encodeOctetString · Issue #81 · mz-automation/libiec61850 · GitHub

https://github.com/mz-automation/libiec61850/issues/81

github

security/libiec61850 at master · fouzhe/security · GitHub

https://github.com/fouzhe/security/tree/master/libiec61850

Weakness Classification(1)

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

CWE-787Out-of-bounds Write

Data Freshness Timeline

(refreshed 9× in last 7d / 19× 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.

2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
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2026-05-31 22:29 UTCepss_batch
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2026-05-29 13:41 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 01:33 UTCEG score recompute
2026-05-28 01:33 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-2018-18834?

CVE-2018-18834 is a critical vulnerability published on October 30, 2018. An issue has been found in libIEC61850 v1.3. It is a heap-based buffer overflow in BerEncoderencodeOctetString in mms/asn1/berencoder.c.

When was CVE-2018-18834 disclosed?

CVE-2018-18834 was first published in the National Vulnerability Database on October 30, 2018, 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-2018-18834 actively exploited?

CVE-2018-18834 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 63.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-18834?

CVE-2018-18834 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2018-18834?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-18834, 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-2018-18834

📅 Published

🔄 Last Modified

📋 Advisory Details (2)