CVE-2023-52557

HIGHCVSS 7.5

7.5

In OpenBSD 7.3 before errata 016, npppd(8) could crash by a l2tp message which has an AVP (Attribute-Value Pair) with wrong length.

CVSS v3: 7.5
EG Score: —
EPSS: —
KEV: Not listed

Published

March 1, 2024

Last Modified

October 10, 2025

References (4)

9119a7d8-5eab-497f-8521-727c672e3725https://ftp.openbsd.org/pub/OpenBSD/patches/7.3/common/016_npppd.patch.sig
9119a7d8-5eab-497f-8521-727c672e3725https://github.com/openbsd/src/commit/abf3a29384c582c807a621e7fc6e7c68d0cafe9b
af854a3a-2127-422b-91ae-364da2661108https://ftp.openbsd.org/pub/OpenBSD/patches/7.3/common/016_npppd.patch.sig
af854a3a-2127-422b-91ae-364da2661108https://github.com/openbsd/src/commit/abf3a29384c582c807a621e7fc6e7c68d0cafe9b

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 8× 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.

2026-05-27 13:40 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-24 07:26 UTCEG score recompute
2026-05-24 07:26 UTCGHSA enrichment

Frequently asked(4)

What is CVE-2023-52557?

CVE-2023-52557 is a high vulnerability published on March 1, 2024. In OpenBSD 7.3 before errata 016, npppd(8) could crash by a l2tp message which has an AVP (Attribute-Value Pair) with wrong length.

When was CVE-2023-52557 disclosed?

CVE-2023-52557 was first published in the National Vulnerability Database on March 1, 2024, with the most recent update on October 10, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

What is the CVSS score of CVE-2023-52557?

CVE-2023-52557 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2023-52557?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-52557, 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-2023-52557

📅 Published

🔄 Last Modified

🔗 References (4)