RealTerm Serial Terminal 2.0.0.70 SEH Overflow Crash
Published Mar 21, 2026
6.9
MEDIUMCVSS 4.0
EPSS 0.19%
Description
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.
Affected products
-
- Version 2.0.0.70StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Realterm | RealTerm: Serial Terminal | n/a |
|
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
1 other source (NVD) ▾
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
1 other source (CVE.org) ▾
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Mar 23, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
Mar–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.19% (0.00190) | 7.86th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.19% (0.00190) | 8.79th | v5 (v2026.06.15) |
| Mar 22, 2026 | 0.01% (0.00012) | 1.53th | v4 (v2025.03.14) |
References (4)
- https://realterm.sourceforge.io/ product
- https://sourceforge.net/projects/realterm/files/ product
- https://www.exploit-db.com/exploits/46391 exploitThird Party AdvisoryVDB Entry
- https://www.vulncheck.com/advisories/realterm-serial-terminal-seh-overflow-crash third-party-advisoryThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://realterm.sourceforge.io/ | product | |
| https://sourceforge.net/projects/realterm/files/ | product | |
| https://www.exploit-db.com/exploits/46391 | exploitThird Party AdvisoryVDB Entry | |
| https://www.vulncheck.com/advisories/realterm-serial-terminal-seh-overflow-crash | third-party-advisoryThird Party Advisory |
Change history (0)
No recorded changes yet.