CVE-2023-21715

Status: AnalyzedHigh (7.3)⚠ Active exploitation

Microsoft Publisher Security Feature Bypass Vulnerability

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Base score: 7.3

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 12%
Percentile among all scored CVEs: 96
Score date: 10/6/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

CISA KEV — actively exploited

Added to catalog: 2/14/2023
Remediation due date: 3/7/2023
Known ransomware use: Unknown

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1203 Exploitation for Client Executionexecution85 %
Primary impactT1204.002 Malicious Fileexecution80 %
Secondary impactT1559.002 Dynamic Data Exchangeexecution70 %

Explotación corregida por reglas (vector CVSS): era T1068

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Behavior Prevention on Endpoint Application Isolation and Sandboxing User Training Execution Prevention Disable or Remove Feature or Program Exploit Protection

Affected technologies (1)

Microsoft — 365 Apps

CWEs

CWE-863
CWE-863

References

Raw JSON (NVD)

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{
  "id": "CVE-2023-21715",
  "cveTags": [],
  "metrics": {
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      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
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          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "active"
            },
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              "automatable": "no"
            },
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          ],
          "version": "2.0.3",
          "timestamp": "2025-02-04T16:09:34.022061Z"
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          "confidentialityImpact": "HIGH"
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        "impactScore": 5.9,
        "exploitabilityScore": 1.3
      },
      {
        "type": "Primary",
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        },
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      }
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  },
  "affected": [
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      "affectedData": [
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          "product": "Microsoft 365 Apps for Enterprise",
          "versions": [
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              "version": "16.0.1",
              "lessThan": "https://aka.ms/OfficeSecurityReleases",
              "versionType": "custom"
            }
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          "platforms": [
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  "published": "2023-02-14T20:15:14.280",
  "references": [
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      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21715",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21715",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21715",
      "tags": [
        "US Government Resource"
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
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      "source": "nvd@nist.gov",
      "description": [
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    },
    {
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        }
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Microsoft Publisher Security Feature Bypass Vulnerability"
    }
  ],
  "lastModified": "2026-08-19T17:18:12.137",
  "cisaActionDue": "2023-03-07",
  "cisaExploitAdd": "2023-02-14",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "40C15EDD-98D4-4D06-BA06-21AE0F33C72D"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secure@microsoft.com",
  "cisaRequiredAction": "Apply updates per vendor instructions.",
  "cisaVulnerabilityName": "Microsoft Office Publisher Security Feature Bypass Vulnerability"
}