Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
CVE-2026-55141
HIGHPre-NVD 7.87.8Trending — 3 sources updated this week
EchelonGraph scoreLOW confidence
This high-severity CVE scores 7.8 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: cna:microsoft
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: —CVSS: 7.8Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.8
- EG Score
- 7.8(low)
- EPSS
- —
- KEV
- Not listed
Published
July 14, 2026
Last Modified
July 14, 2026
References (1)
Vendor Advisories for CVE-2026-55141(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
All Vendor Advisories
(1)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
Data Freshness Timeline
(refreshed 3× in last 7d / 3× 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.
- 2026-07-14 17:44 UTCEG score recompute
- 2026-07-14 17:44 UTCVendor advisory
- 2026-07-14 17:40 UTCMITRE cvelistV5first tracked
Related CVEs(same vendor + same CWE)
Same vendor
10 shownmsrc
- CVE-2006-10003EG 9.8CRITICAL
- CVE-2015-20107NVD 7.6EG 9.8EPSS 94%HIGH
- CVE-2013-7381EG 9.8CRITICAL
- CVE-2014-0048EG 9.8EPSS 93%CRITICAL
- CVE-2007-4559EG 9.8EPSS 98%CRITICAL
- CVE-2013-3900NVD 5.5EG 9.0 KEVEPSS 99%MEDIUM
- CVE-2013-2094NVD 8.4EG 9.0 KEVEPSS 99%HIGH
- CVE-2014-9356EG 8.6EPSS 91%HIGH
- CVE-2014-5282EG 8.1HIGH
- CVE-2014-8141EG 7.8EPSS 94%HIGH
Same CWE
10 shownCWE-121
- CVE-2012-10058EG 10.0CRITICAL
- CVE-2010-20113EG 9.8CRITICAL
- CVE-2010-20121EG 9.8CRITICAL
- CVE-2012-10060EG 9.8CRITICAL
- CVE-2012-10023EG 9.8CRITICAL
- CVE-2013-10042EG 9.8CRITICAL
- CVE-2012-10021EG 9.8CRITICAL
- CVE-2014-125117EG 9.8EPSS 91%CRITICAL
- CVE-2017-14854NVD 9.1EG 9.8EPSS 94%CRITICAL
- CVE-2015-1006EG 9.8EPSS 92%CRITICAL
Frequently asked(4)
What is CVE-2026-55141?
CVE-2026-55141 is a high vulnerability published on July 14, 2026. Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
When was CVE-2026-55141 disclosed?
CVE-2026-55141 was first published in the National Vulnerability Database on July 14, 2026. 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-2026-55141?
CVE-2026-55141 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-55141?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55141, 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-2026-55141
Is Your Infrastructure Affected by CVE-2026-55141?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.