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CVE-2021-35977: An issue was discovered in Digi RealPort for Windows through 4.8.488.0. A buffer overflow exists in the handling of ADDP discovery response messages. This could result in arbitrary code execution.

CVE-2021-35977 · published 5 years ago

Summary

An issue was discovered in Digi RealPort for Windows through 4.8.488.0. A buffer overflow exists in the handling of ADDP discovery response messages. This could result in arbitrary code execution.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software

Vendor	Product	Affected versions
digi	realport	<= 1.9-40 <= 4.8.488.0 `cpe:2.3:a:digi:realport::::::linux::*`
digi	connectport_ts_8\/16_firmware	All versions `cpe:2.3:o:digi:connectport_ts_8\/16_firmware::::::::`
digi	connectport_lts_8\/16\/32_firmware	All versions `cpe:2.3:o:digi:connectport_lts_8\/16\/32_firmware::::::::`
digi	passport_integrated_console_server_firmware	All versions `cpe:2.3:o:digi:passport_integrated_console_server_firmware::::::::`
digi	cm_firmware	All versions `cpe:2.3:o:digi:cm_firmware::::::::`
digi	portserver_ts_firmware	All versions `cpe:2.3:o:digi:portserver_ts_firmware::::::::`
digi	portserver_ts_mei_firmware	All versions `cpe:2.3:o:digi:portserver_ts_mei_firmware::::::::`
digi	portserver_ts_mei_hardened_firmware	All versions `cpe:2.3:o:digi:portserver_ts_mei_hardened_firmware::::::::`
digi	portserver_ts_m_mei_firmware	All versions `cpe:2.3:o:digi:portserver_ts_m_mei_firmware::::::::`
digi	6350-sr_firmware	All versions `cpe:2.3:o:digi:6350-sr_firmware::::::::`
digi	portserver_ts_p_mei_firmware	All versions `cpe:2.3:o:digi:portserver_ts_p_mei_firmware::::::::`
digi	transport_wr11_xt_firmware	All versions `cpe:2.3:o:digi:transport_wr11_xt_firmware::::::::`
digi	one_iap_family_firmware	All versions `cpe:2.3:o:digi:one_iap_family_firmware::::::::`
digi	one_ia_firmware	All versions `cpe:2.3:o:digi:one_ia_firmware::::::::`
digi	wr31_firmware	All versions `cpe:2.3:o:digi:wr31_firmware::::::::`
digi	wr44_r_firmware	All versions `cpe:2.3:o:digi:wr44_r_firmware::::::::`
digi	connect_es_firmware	All versions `cpe:2.3:o:digi:connect_es_firmware::::::::`
digi	wr21_firmware	All versions `cpe:2.3:o:digi:wr21_firmware::::::::`

Original advisory text

An issue was discovered in Digi RealPort for Windows through 4.8.488.0. A buffer overflow exists in the handling of ADDP discovery response messages. This could result in arbitrary code execution.

References

https://raw.githubusercontent.com/reidmefirst/vuln-disclosure/main/2021-02.txt Third Party Advisory

Fix within

Internet-facing 3 days

Internal 60 days

Not known to be exploited
Can be exploited automatically (estimated)
Gives an attacker full control (estimated)

Severity

9.8 Critical

Exploitation

2% chance of attack within 30 days

Type

CWE-120Classic Buffer Overflow

Timeline

Published8 Oct 2021

Updated3 Nov 2026

First seen29 Sep 2026

Sources

CVE-2021-35977 · NVD

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