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TI-2019-15622 Aliases CVE-2019-25569GHSA-qm4h-vmrq-638h

RealTerm Serial Terminal 2.0.0.70 SEH Overflow Crash

Priority MEDIUM 64CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

RealTerm Serial Terminal 2.0.0.70 contains a stack-based buffer overflow vulnerability in the Echo Port field that allows local attackers to crash the application by triggering a structured exception handler (SEH) chain corruption. Attackers can craft a malicious input string with 268 bytes of padding followed by SEH overwrite values and paste it into the Port field to cause denial of service.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00198 9th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
RealtermRealTerm: Serial Terminal2.0.0.70—No fix listedCNA
  • RealTerm: Serial Terminal VendorRealterm Affected 2.0.0.70 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:crun:realterm:2.0.0.70:*:*:*:*:*:*:*2.0.0.70VulnerableRealterm
  • cpe:2.3:a:crun:realterm:2.0.0.70:*:*:*:*:*:*:* Versions 2.0.0.70 Vulnerable ·Realterm

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-25569
  2. 2026-10-03 Alias added: GHSA-qm4h-vmrq-638h

References

Exploit 1

Other 2

  • TI-2019-15732 RealTerm Serial Terminal 2.0.0.70 Buffer Overflow SEH CVSS 4.0HIGH 8.5
  • TI-2019-15623 RealTerm Serial Terminal 2.0.0.70 Denial of Service via Port Field CVSS 4.0MEDIUM 6.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences