Vulnerability-Lookup

GHSA-8PCF-2R89-JJR2

Vulnerability from github – Published: 2026-08-13 18:31 – Updated: 2026-08-13 21:36

Details

CVE-2026-55401 is a null dereference vulnerability on the load-balancing sub-system of Secure Access servers prior to 14.57. Attackers can send an unauthenticated packet to a Secure Access server with load balancing enabled, which results in the internal load balancer crashing. After a successful attack, the Secure Access server is still able to accept connections and is still able to issue a failover to connected clients. ‍ https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L

Severity

6.9 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-55401"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-13T16:18:07Z",
    "severity": "MODERATE"
  },
  "details": "CVE-2026-55401 is a null dereference vulnerability on the load-balancing\n sub-system of Secure Access servers prior to 14.57. Attackers can send \nan unauthenticated packet to a Secure Access server with load balancing \nenabled, which results in the internal load balancer crashing. After a \nsuccessful attack, the Secure Access server is still able to accept \nconnections and is still able to issue a failover to connected clients. \u200d https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L",
  "id": "GHSA-8pcf-2r89-jjr2",
  "modified": "2026-08-13T21:36:04Z",
  "published": "2026-08-13T18:31:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55401"
    },
    {
      "type": "WEB",
      "url": "https://www.absolute.com/platform/security-information/vulnerability-archive/cve-2026-55401"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-55401 (GCVE-0-2026-55401)

Vulnerability from cvelistv5 – Published: 2026-08-13 16:11 – Updated: 2026-08-13 19:03

Summary

Severity

6.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-13 19:03 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

Absolute

References

1 reference

URL	Tags
https://www.absolute.com/platform/security-inform…

Impacted products

1 product

Vendor	Product	Version
Absolute Security	Secure Access	Affected: 0 , < 14.57 (Server)

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JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-55401",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-13T19:03:25.331247Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-476",
                "description": "CWE-476 NULL Pointer Dereference",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-13T19:03:32.732Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Secure Access",
          "vendor": "Absolute Security",
          "versions": [
            {
              "lessThan": "14.57",
              "status": "affected",
              "version": "0",
              "versionType": "Server"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "CVE-2026-55401 is a null dereference vulnerability on the load-balancing\n sub-system of Secure Access servers prior to 14.57. Attackers can send \nan unauthenticated packet to a Secure Access server with load balancing \nenabled, which results in the internal load balancer crashing. After a \nsuccessful attack, the Secure Access server is still able to accept \nconnections and is still able to issue a failover to connected clients.\u003ca href=\"https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L\"\u003e\u200d\u003c/a\u003e"
            }
          ],
          "value": "CVE-2026-55401 is a null dereference vulnerability on the load-balancing\n sub-system of Secure Access servers prior to 14.57. Attackers can send \nan unauthenticated packet to a Secure Access server with load balancing \nenabled, which results in the internal load balancer crashing. After a \nsuccessful attack, the Secure Access server is still able to accept \nconnections and is still able to issue a failover to connected clients. \u200d https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L"
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
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      "providerMetadata": {
        "dateUpdated": "2026-08-13T16:11:08.672Z",
        "orgId": "b6533044-ea05-4482-8458-7bddeca0d079",
        "shortName": "Absolute"
      },
      "references": [
        {
          "url": "https://www.absolute.com/platform/security-information/vulnerability-archive/cve-2026-55401"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "x_generator": {
        "engine": "Vulnogram 1.0.4"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b6533044-ea05-4482-8458-7bddeca0d079",
    "assignerShortName": "Absolute",
    "cveId": "CVE-2026-55401",
    "datePublished": "2026-08-13T16:11:08.672Z",
    "dateReserved": "2026-06-16T21:26:37.698Z",
    "dateUpdated": "2026-08-13T19:03:32.732Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

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GHSA-8PCF-2R89-JJR2

CVE-2026-55401 (GCVE-0-2026-55401)

Tags

Sightings

Nomenclature