How severe is CVE-2021-40853?

CVE-2021-40853 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-40853 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40853?

CVE-2021-40853 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-2021-40853?

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-2021-40853 published?

CVE-2021-40853 was published on 2021-12-17 and last updated on 2026-06-17.

CVE-2021-40853

CVE-2021-40853 is a high-severity vulnerability in Tcman Gim with a CVSS 3.x base score of 7.2. 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-862.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 6.4
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Tcman Gim
Published: 2021-12-17
Last modified: 2026-06-17

Description

TCMAN GIM does not perform an authorization check when trying to access determined resources. A remote attacker could exploit this vulnerability to access URL that require privileges without having them. The exploitation of this vulnerability might allow a remote attacker to obtain sensible information.

Frequently asked questions

What is CVE-2021-40853?: TCMAN GIM does not perform an authorization check when trying to access determined resources. A remote attacker could exploit this vulnerability to access URL that require privileges without having them. The exploitation of this vulnerability might allow a remote attacker to obtain sensible information.
How severe is CVE-2021-40853?: CVE-2021-40853 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-40853 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40853?: CVE-2021-40853 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-2021-40853?: 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-2021-40853 published?: CVE-2021-40853 was published on 2021-12-17 and last updated on 2026-06-17.

References

https://www.incibe.es/en/incibe-cert/notices/aviso/tcman-gim-missing-authorization-vulnerability

Affected products (2)

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

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