How severe is CVE-2023-4299?

CVE-2023-4299 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-4299 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-4299?

CVE-2023-4299 primarily affects Digi Realport. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-4299?

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

When was CVE-2023-4299 published?

CVE-2023-4299 was published on 2023-08-31 and last updated on 2026-06-17.

CVE-2023-4299

CVE-2023-4299 is a critical-severity vulnerability in Digi Realport with a CVSS 3.x base score of 9.0. 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-836.

Key facts

Severity: Critical (CVSS 3.x base score 9.0)
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-836
Affected product: Digi Realport
Published: 2023-08-31
Last modified: 2026-06-17

Description

Digi RealPort Protocol is vulnerable to a replay attack that may allow an attacker to bypass authentication to access connected equipment.

Frequently asked questions

What is CVE-2023-4299?: Digi RealPort Protocol is vulnerable to a replay attack that may allow an attacker to bypass authentication to access connected equipment.
How severe is CVE-2023-4299?: CVE-2023-4299 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-4299 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-4299?: CVE-2023-4299 primarily affects Digi Realport. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-4299?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-4299 published?: CVE-2023-4299 was published on 2023-08-31 and last updated on 2026-06-17.

References

Affected products (21)

cpe:2.3:a:digi:realport:*:*:*:*:*:linux:*:*
cpe:2.3:a:digi:realport:*:*:*:*:*:windows:*:*
cpe:2.3:o:digi:connectport_ts_8\/16_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:digi:passport_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:digi:connectport_lts_8\/16\/32_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:digi:cm_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:digi:portserver_ts_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:digi:portserver_ts_mei_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:digi:portserver_ts_mei_hardened_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:digi:portserver_ts_m_mei_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:digi:portserver_ts_p_mei_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:digi:one_iap_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:digi:one_ia_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:digi:one_sp_ia_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:digi:one_sp_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:digi:wr31_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:digi:transport_wr11_xt_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:digi:wr44_r_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:digi:wr21_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:digi:connect_es_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:digi:connect_sp_firmware:-:*:*:*:*:*:*:*

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