KEV Intelligence

Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2007-0671

Excel

Microsoft / Excel

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Severity
CVSS 8.8 · High
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
42.1%
First observed
—
Last observed
—

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2007-0671 is an unauthenticated vulnerability affecting Microsoft Excel. Unspecified vulnerability in Microsoft Excel 2000, XP, 2003, and 2004 for Mac, and possibly other Office products, allows remote...

Is it exploited?

Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.

Who is affected?

Microsoft / Excel.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

Excel

Unspecified vulnerability in Microsoft Excel 2000, XP, 2003, and 2004 for Mac, and possibly other Office products, allows remote user-assisted attackers to execute arbitrary code via unknown attack vectors, as demonstrated by Exploit-MSExcel.h in targeted zero-day attacks.

View vendor advisory (opens in new tab)
Published
03 Feb 2007
Exploitation Reported
01 Jun 2026
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
Required

Tags

cisa microsoft

CVE References

  • CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2007-0671
  • MS07-015 docs.microsoft.com · Vendor Advisory https://docs.microsoft.com/en-us/security-updates/securitybulletins/2...
  • VU#613740 kb.cert.org · Third-Party Advisory http://www.kb.cert.org/vuls/id/613740
  • 24008 secunia.com · Third-Party Advisory http://secunia.com/advisories/24008
  • TA07-044A us-cert.gov · Third-Party Advisory http://www.us-cert.gov/cas/techalerts/TA07-044A.html
  • ADV-2007-0463 vupen.com · VDB Entry http://www.vupen.com/english/advisories/2007/0463
  • oval:org.mitre.oval:def:301 oval.cisecurity.org · VDB Entry https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.m...
  • 31901 osvdb.org · VDB Entry http://osvdb.org/31901
  • 1017584 securitytracker.com · VDB Entry http://securitytracker.com/id?1017584
  • office-unspecified-code-execution(32178) exchange.xforce.ibmcloud.com · VDB Entry https://exchange.xforce.ibmcloud.com/vulnerabilities/32178
  • 22383 securityfocus.com · VDB Entry http://www.securityfocus.com/bid/22383
  • microsoft.com/technet/security/advisory/932553.mspx microsoft.com · CVE Record http://www.microsoft.com/technet/security/advisory/932553.mspx
  • avertlabs.com/research/blog avertlabs.com · CVE Record http://www.avertlabs.com/research/blog/?p=191
  • vil.nai.com/vil/content/v_141393.htm vil.nai.com · CVE Record http://vil.nai.com/vil/content/v_141393.htm

Exploitation evidence

Why KEV Intelligence marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CVE

Recorded 01 Jun 2026

Independent exploitation attestation added to the KEV Intelligence record.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.

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Source Added
CVE First 2026-06-01 10:38 UTC
CISA 2026-06-02 14:06 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
0
User-Agents
0

Raw values available in Pro and Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

No detection artifacts or sensor request patterns are available for this CVE yet.

Check back as sensor telemetry and scanner integrations are updated.

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

42.1%

All CVSS Scores

CVSS v3.1 8.8 High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2.0 9.3 High

AV:N/AC:M/Au:N/C:C/I:C/A:C

Timeline

From disclosure to observed exploitation

  1. Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  2. Added to KEV Intelligence KEV Feed

    High-confidence, third-party attested exploitation

  3. CVE published

    Vulnerability disclosed publicly

  4. CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2007-0671

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2007-0671",
  "confidence": "Confirmed",
  "cvss_score": 8.8,
  "cvss_estimated": false,
  "epss_score": 0.42139,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}

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