CVE-2021-3287 (GCVE-0-2021-3287)

Vulnerability from cvelistv5 – Published: 2021-04-22 12:58 – Updated: 2024-08-03 16:53
VLAI Previdian
Summary
Zoho ManageEngine OpManager before 12.5.329 allows unauthenticated Remote Code Execution due to a general bypass in the deserialization class.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • n/a
Assigner
References
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: ea313553-a8b5-4d00-af68-4ba1f79c62f8

Vulnerability ID: CVE-2021-3287

Status: Confirmed

Status Updated: 2021-04-22 14:58 CEST

Exploited: Yes

Timestamps
First Seen: 2021-04-22
Asserted: 2021-04-22
Scope
Notes: Zoho ManageEngine OpManager before 12.5.329 allows unauthenticated Remote Code Execution due to a general bypass in the deserialization class. | Affected: Zoho / ManageEngine OpManager | CVSS: 9.8 (CRITICAL) | EPSS: 0.51332 | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: previdian

Details
Feed Previdian (previdian.com)
Title Zoho ManageEngine OpManager before 12.5.329 allows unauthenticated Remote Code Execution due to a general bypass in the deserialization class.
Cve Id CVE-2021-3287
Vendor Zoho
Ghsa Id None
Product ManageEngine OpManager
Added Date 2021-04-22T12:58:00.000Z
Cvss Score 9.8
Epss Score 0.51332
Previous Ids
Cvss Severity CRITICAL
Virtual Patch False
Cvss Estimated False
Epss Percentile 0.98905
Used In Malware unknown
Vulnerability Id CVE-2021-3287
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-10-02 09:11 CEST | Updated: 2026-10-02 09:11 CEST
Show details on NVD website
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                    "matchCriteriaId": "94AF723B-F1B7-44A8-B654-7C10881A6AF8",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125233:*:*:*:*:*:*",
                    "matchCriteriaId": "0C65E8BE-968F-4AB8-BD3F-A123C66E576A",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125312:*:*:*:*:*:*",
                    "matchCriteriaId": "9A4C70B1-A902-4835-BFFC-692CA91C1317",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125323:*:*:*:*:*:*",
                    "matchCriteriaId": "06FE113C-94B6-419B-8AA0-767EA74D11ED",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125324:*:*:*:*:*:*",
                    "matchCriteriaId": "C30413D5-7F5B-47EE-825E-CEEF69DAC5B7",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125326:*:*:*:*:*:*",
                    "matchCriteriaId": "57DA6C66-3235-4923-89D0-EF093FF4126F",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:zohocorp:manageengine_opmanager:12.5:build125328:*:*:*:*:*:*",
                    "matchCriteriaId": "82307372-C2CF-4E19-9D1D-7D33FCCE8F5B",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Zoho ManageEngine OpManager before 12.5.329 allows unauthenticated Remote Code Execution due to a general bypass in the deserialization class."
          },
          {
            "lang": "es",
            "value": "Zoho ManageEngine OpManager versiones anteriores a 12.5.329, permite una ejecuci\u00f3n de c\u00f3digo remota no autenticada debido a una omisi\u00f3n general en la clase de deserializaci\u00f3n"
          }
        ],
        "id": "CVE-2021-3287",
        "lastModified": "2026-06-17T04:04:53.700",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "HIGH",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 7.5,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
                "version": "2.0"
              },
              "exploitabilityScore": 10.0,
              "impactScore": 6.4,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 9.8,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2021-04-22T13:15:07.970",
        "references": [
          {
            "source": "cve@mitre.org",
            "tags": [
              "Exploit",
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://packetstormsecurity.com/files/164231/ManageEngine-OpManager-SumPDU-Java-Deserialization.html"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Release Notes",
              "Vendor Advisory"
            ],
            "url": "https://www.manageengine.com/network-monitoring/help/read-me-complete.html#125329"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Exploit",
              "Third Party Advisory",
              "VDB Entry"
            ],
            "url": "http://packetstormsecurity.com/files/164231/ManageEngine-OpManager-SumPDU-Java-Deserialization.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Release Notes",
              "Vendor Advisory"
            ],
            "url": "https://www.manageengine.com/network-monitoring/help/read-me-complete.html#125329"
          }
        ],
        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-502"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.