How severe is CVE-2020-26173?

CVE-2020-26173 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2020-26173 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-26173?

CVE-2020-26173 affects Tangro Business Workflow. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-26173?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-26173 published?

CVE-2020-26173 was published on 2020-12-18 and last updated on 2026-06-17.

CVE-2020-26173

CVE-2020-26173 is a low-severity vulnerability in Tangro Business Workflow with a CVSS 3.x base score of 3.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-306.

Key facts

Severity: Low (CVSS 3.x base score 3.1)
CVSS v2: 4.0
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Tangro Business Workflow
Published: 2020-12-18
Last modified: 2026-06-17

Description

An incorrect access control implementation in Tangro Business Workflow before 1.18.1 allows an attacker to download documents (PDF) by providing a valid document ID and token. No further authentication is required.

Frequently asked questions

What is CVE-2020-26173?: An incorrect access control implementation in Tangro Business Workflow before 1.18.1 allows an attacker to download documents (PDF) by providing a valid document ID and token. No further authentication is required.
How severe is CVE-2020-26173?: CVE-2020-26173 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2020-26173 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-26173?: CVE-2020-26173 affects Tangro Business Workflow. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-26173?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-26173 published?: CVE-2020-26173 was published on 2020-12-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:tangro:business_workflow:*:*:*:*:*:*:*:*

More vulnerabilities in Tangro Business Workflow

CVE-2020-26174 — High (CVSS 8.8): tangro Business Workflow before 1.18.1 requests a list of allowed filetypes from the server and restricts uploads to…
CVE-2020-26175 — Medium (CVSS 6.5): In tangro Business Workflow before 1.18.1, an attacker can manipulate the value of PERSON in requests to /api/profile…
CVE-2020-26178 — Medium (CVSS 5.3): In tangro Business Workflow before 1.18.1, knowing an attachment ID, it is possible to download workitem attachments…
CVE-2020-26177 — Medium (CVSS 4.3): In tangro Business Workflow before 1.18.1, a user's profile contains some items that are greyed out and thus are not…
CVE-2020-26176 — Medium (CVSS 4.3): An issue was discovered in tangro Business Workflow before 1.18.1. No (or broken) access control checks exist on the…
CVE-2020-26171 — Medium (CVSS 4.3): In tangro Business Workflow before 1.18.1, the documentId of attachment uploads to /api/document/attachments/upload can…

All CVEs affecting Tangro Business Workflow →

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