CVE-2019-25569

MEDIUMNVD 5.56.2▲
EchelonGraph scoreMEDIUM confidence

Score 6.2 from GitHub Security Advisory published 2026-03-21. NVD baseline CVSS 5.5; sources differ by 0.7.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
5.5
EG Score
6.2(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity62% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

March 21, 2026

Last Modified

June 17, 2026

Advisory Details (4)

Auto-updated Aug 6, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

RealTerm Serial Terminal 2.0.0.70 SEH Overflow Crash | Advisories | VulnCheck

https://www.vulncheck.com/advisories/realterm-serial-terminal-seh-overflow-crash
generic🟡 PoC Available

Realterm Serial Terminal 2.0.0.70 - Local Buffer Overflow (SEH) - Windows dos Exploit

https://www.exploit-db.com/exploits/46391
generic

RealTerm: Serial/TCP Terminal - Browse Files at SourceForge.net

https://sourceforge.net/projects/realterm/files/
generic

Terminal Software

https://realterm.sourceforge.io/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 22× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-18 19:22 UTCEPSS rescore
  2. 2026-09-17 19:22 UTCEPSS rescore
  3. 2026-09-16 14:04 UTCEPSS rescore
  4. 2026-09-15 03:05 UTCEPSS rescore
  5. 2026-09-13 16:42 UTCEPSS rescore
  6. 2026-09-12 14:56 UTCEPSS rescore
  7. 2026-09-11 14:48 UTCEPSS rescore
  8. 2026-09-11 09:32 UTCEPSS rescore
  9. 2026-09-07 15:57 UTCEPSS rescore
  10. 2026-09-06 13:44 UTCEPSS rescore
  11. 2026-09-05 15:24 UTCEPSS rescore
  12. 2026-09-04 13:56 UTCEPSS rescore
  13. 2026-09-02 14:07 UTCEPSS rescore
  14. 2026-09-01 03:32 UTCEPSS rescore
  15. 2026-08-30 19:13 UTCEPSS rescore
  16. 2026-08-30 01:18 UTCEPSS rescore
  17. 2026-08-28 21:36 UTCEPSS rescore
  18. 2026-08-27 14:21 UTCEPSS rescore
  19. 2026-08-26 14:42 UTCEPSS rescore
  20. 2026-08-25 13:45 UTCEPSS rescore
  21. 2026-08-24 14:11 UTCEPSS rescore
  22. 2026-08-21 23:45 UTCEPSS rescore
  23. 2026-08-20 22:51 UTCEPSS rescore
  24. 2026-08-19 17:00 UTCEPSS rescore
  25. 2026-08-18 13:44 UTCEPSS rescore
Show 37 more
  1. 2026-08-16 14:52 UTCEPSS rescore
  2. 2026-08-16 10:53 UTCEG score recompute
  3. 2026-08-16 10:53 UTCGHSA enrichment
  4. 2026-08-16 02:10 UTCEPSS rescore
  5. 2026-08-15 01:26 UTCEPSS rescore
  6. 2026-08-14 07:04 UTCEG score recompute
  7. 2026-08-14 07:04 UTCGHSA enrichment
  8. 2026-08-12 21:45 UTCEG score recompute
  9. 2026-08-12 21:45 UTCGHSA enrichment
  10. 2026-08-12 13:47 UTCEPSS rescore
  11. 2026-08-11 08:35 UTCEG score recompute
  12. 2026-08-11 08:35 UTCGHSA enrichment
  13. 2026-08-10 07:38 UTCEG score recompute
  14. 2026-08-10 07:38 UTCGHSA enrichment
  15. 2026-08-09 13:43 UTCEPSS rescore
  16. 2026-08-09 06:39 UTCEG score recompute
  17. 2026-08-09 06:39 UTCGHSA enrichment
  18. 2026-08-08 16:33 UTCEPSS rescore
  19. 2026-08-07 17:03 UTCEG score recompute
  20. 2026-08-07 17:03 UTCGHSA enrichment
  21. 2026-08-07 16:23 UTCEPSS rescore
  22. 2026-08-06 13:43 UTCEPSS rescore
  23. 2026-08-06 01:21 UTCEG score recompute
  24. 2026-08-06 01:21 UTCGHSA enrichment
  25. 2026-08-05 19:13 UTCEPSS rescore
  26. 2026-08-04 15:05 UTCEPSS rescore
  27. 2026-08-04 00:30 UTCEG score recompute
  28. 2026-08-04 00:30 UTCGHSA enrichment
  29. 2026-08-02 16:00 UTCEG score recompute
  30. 2026-08-02 16:00 UTCGHSA enrichment
  31. 2026-08-02 02:23 UTCEPSS rescore
  32. 2026-08-01 04:12 UTCEPSS rescore
  33. 2026-07-30 16:24 UTCEPSS rescore
  34. 2026-07-30 01:27 UTCEPSS rescore
  35. 2026-07-28 15:32 UTCEPSS rescore
  36. 2026-07-27 14:33 UTCEG score recompute
  37. 2026-07-27 14:33 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2019-25569?
CVE-2019-25569 is a medium vulnerability published on March 21, 2026. 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…
When was CVE-2019-25569 disclosed?
CVE-2019-25569 was first published in the National Vulnerability Database on March 21, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-25569 actively exploited?
CVE-2019-25569 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 91.0% of all scored CVEs.
What is the CVSS score of CVE-2019-25569?
CVE-2019-25569 has a CVSS v3 base score of 5.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.2.
How do I remediate CVE-2019-25569?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-25569, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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