How severe is CVE-2026-29963?

CVE-2026-29963 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-2026-29963 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-29963?

CVE-2026-29963 affects Hsclabs Mailinspector. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-29963?

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.

Does CVE-2026-29963 have an EU (EUVD) identifier?

Yes. CVE-2026-29963 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30783.

When was CVE-2026-29963 published?

CVE-2026-29963 was published on 2026-05-18 and last updated on 2026-06-17.

CVE-2026-29963

CVE-2026-29963 is a high-severity vulnerability in Hsclabs Mailinspector 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-22.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30783
Weakness: CWE-22
Affected product: Hsclabs Mailinspector
Published: 2026-05-18
Last modified: 2026-06-17

Description

HSC MailInspector 5.3.3-7 has a Path Traversal vulnerability due to improper validation of user-supplied input in the /tap/dw.php endpoint. The text parameter is used to construct file paths without adequate normalization or restriction to a safe base directory. A remote attacker can exploit this flaw to access arbitrary files on the underlying operating system, resulting in unauthorized disclosure of sensitive information.

Frequently asked questions

What is CVE-2026-29963?: HSC MailInspector 5.3.3-7 has a Path Traversal vulnerability due to improper validation of user-supplied input in the /tap/dw.php endpoint. The text parameter is used to construct file paths without adequate normalization or restriction to a safe base directory. A remote attacker can exploit this flaw to access arbitrary files on the underlying operating system, resulting in unauthorized disclosure of sensitive information.
How severe is CVE-2026-29963?: CVE-2026-29963 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-2026-29963 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-29963?: CVE-2026-29963 affects Hsclabs Mailinspector. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-29963?: 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.
Does CVE-2026-29963 have an EU (EUVD) identifier?: Yes. CVE-2026-29963 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30783.
When was CVE-2026-29963 published?: CVE-2026-29963 was published on 2026-05-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:hsclabs:mailinspector:5.3.3-7:*:*:*:*:*:*:*

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CVE-2026-29965 — Medium (CVSS 6.1): HSC MailInspector 5.3.3-7 is vulnerable to Cross Site Scripting (XSS) in the /police/WarningUrlPage.php endpoint due to…
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