How severe is CVE-2021-40851?

CVE-2021-40851 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-40851 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40851?

CVE-2021-40851 primarily affects Tcman Gim. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-40851?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-40851 published?

CVE-2021-40851 was published on 2021-12-17 and last updated on 2026-06-17.

CVE-2021-40851

CVE-2021-40851 is a high-severity vulnerability in Tcman Gim with a CVSS 3.x base score of 7.5. 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-287.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Tcman Gim
Published: 2021-12-17
Last modified: 2026-06-17

Description

TCMAN GIM is vulnerable to a lack of authorization in all available webservice methods listed in /PC/WebService.asmx. The exploitation of this vulnerability might allow a remote attacker to obtain information.

Frequently asked questions

What is CVE-2021-40851?: TCMAN GIM is vulnerable to a lack of authorization in all available webservice methods listed in /PC/WebService.asmx. The exploitation of this vulnerability might allow a remote attacker to obtain information.
How severe is CVE-2021-40851?: CVE-2021-40851 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-40851 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40851?: CVE-2021-40851 primarily affects Tcman Gim. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-40851?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-40851 published?: CVE-2021-40851 was published on 2021-12-17 and last updated on 2026-06-17.

References

https://www.incibe-cert.es/en/early-warning/security-advisories/tcman-gim-sql-improper-authentication

Affected products (2)

cpe:2.3:a:tcman:gim:8.0:*:*:*:*:*:*:*
cpe:2.3:a:tcman:gim:11.0:*:*:*:*:*:*:*

More vulnerabilities in Tcman Gim

CVE-2021-40850 — Critical (CVSS 10.0): TCMAN GIM is vulnerable to a SQL injection vulnerability inside several available webservice methods in…
CVE-2022-36276 — Critical (CVSS 9.9): TCMAN GIM v8.0.1 is vulnerable to a SQL injection via the 'SqlWhere' parameter inside the function 'BuscarESM'. The…
CVE-2025-41013 — Critical (CVSS 9.8): SQL injection vulnerability in TCMAN GIM v11 in version 20250304. This vulnerability allows an attacker to retrieve,…
CVE-2025-40666 — Critical (CVSS 9.8): Time-based blind SQL injection vulnerabilities in TCMAN's GIM v11. These allow an attacker to retrieve, create, update…
CVE-2025-40665 — Critical (CVSS 9.8): Time-based blind SQL injection vulnerabilities in TCMAN's GIM v11. These allow an attacker to retrieve, create, update…
CVE-2025-40625 — Critical (CVSS 9.8): Unrestricted file upload in TCMAN's GIM v11. This vulnerability allows an unauthenticated attacker to upload any file…

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Other CWE-287 (Improper Authentication) vulnerabilities

CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →