CVE-2026-43864

LOWNVD 2.52.5—Trending — 3 sources updated this week

2.5

mutt before 2.3.2 has a show_sig_summary NULL pointer dereference.

CVSS v3: 2.5
EG Score: 2.5(medium)
EPSS: 3.6%
KEV: Not listed

Published

May 4, 2026

Last Modified

May 5, 2026

References (1)

cve@mitrehttps://github.com/muttmua/mutt/commit/ebfa2969042d89303d15334193fcc32866c8a8df

Weakness Classification(1)

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

CWE-476NULL Pointer Dereference

Data Freshness Timeline

(refreshed 16× in last 7d / 20× 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.

2026-06-08 14:17 UTCEPSS rescore
2026-06-08 14:17 UTCEPSS rescore
2026-06-07 15:25 UTCEPSS rescore
2026-06-07 15:25 UTCEPSS rescore
2026-06-07 09:29 UTCEG score recompute
2026-06-07 09:29 UTCGHSA enrichment
2026-06-06 13:47 UTCEPSS rescore
2026-06-06 13:47 UTCEPSS rescore
2026-06-05 22:47 UTCEPSS rescore
2026-06-05 06:10 UTCEPSS rescore
2026-06-05 06:10 UTCEPSS rescore
2026-06-04 13:12 UTCEPSS rescore
2026-06-04 13:12 UTCEPSS rescore
2026-06-04 09:47 UTCEG score recompute
2026-06-04 09:47 UTCGHSA enrichment
2026-06-02 20:13 UTCEPSS rescore
2026-06-01 13:52 UTCEPSS rescore
2026-06-01 13:52 UTCEPSS rescore
2026-06-01 10:05 UTCEG score recompute
2026-06-01 10:05 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-43864?

CVE-2026-43864 is a low vulnerability published on May 4, 2026. mutt before 2.3.2 has a showsigsummary NULL pointer dereference.

When was CVE-2026-43864 disclosed?

CVE-2026-43864 was first published in the National Vulnerability Database on May 4, 2026, with the most recent update on May 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-43864 actively exploited?

CVE-2026-43864 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-43864?

CVE-2026-43864 has a CVSS v3 base score of 2.5 (NVD).

How do I remediate CVE-2026-43864?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43864, 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-2026-43864

📅 Published

🔄 Last Modified

🔗 References (1)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2026-43864?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (1)

Frequently asked(5)

Related CVEs(same CWE)