How severe is CVE-2021-27753?

CVE-2021-27753 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2021-27753 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27753?

CVE-2021-27753 affects Hcltech Hcl Sametime. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-27753?

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

When was CVE-2021-27753 published?

CVE-2021-27753 was published on 2022-02-21 and last updated on 2026-06-17.

CVE-2021-27753

CVE-2021-27753 is a medium-severity vulnerability in Hcltech Hcl Sametime with a CVSS 3.x base score of 5.5. 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-22.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Hcltech Hcl Sametime
Published: 2022-02-21
Last modified: 2026-06-17

Description

"Sametime Android PathTraversal Vulnerability"

Frequently asked questions

What is CVE-2021-27753?: "Sametime Android PathTraversal Vulnerability"
How severe is CVE-2021-27753?: CVE-2021-27753 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2021-27753 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27753?: CVE-2021-27753 affects Hcltech Hcl Sametime. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-27753?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-27753 published?: CVE-2021-27753 was published on 2022-02-21 and last updated on 2026-06-17.

References

https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0096575

Affected products (1)

cpe:2.3:a:hcltech:hcl_sametime:*:*:*:*:*:android:*:*

More vulnerabilities in Hcltech Hcl Sametime

CVE-2021-27755 — Medium (CVSS 5.5): "Sametime Android potential path traversal vulnerability when using File class"

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