Synactis PDF In-The-Box ConnectToSynactic Stack-Based Buffer Overflow
Published Aug 1, 2025
7.5
HIGHCVSS 4.0
EPSS 1.69%
Description
A stack-based buffer overflow vulnerability exists in Synactis PDF In-The-Box ActiveX control (PDF_IN_1.ocx), specifically the ConnectToSynactis method. When a long string is passed to this method—intended to populate the ldCmdLine argument of a WinExec call—a strcpy operation overwrites a saved TRegistry class pointer on the stack. This allows remote attackers to execute arbitrary code in the context of the user by enticing them to visit a malicious webpage that instantiates the vulnerable ActiveX control. The vulnerability was discovered via its use in third-party software such as Logic Print 2013.
Affected products
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||
|---|---|---|---|---|---|---|
| Synactis | PDF In-The-Box | unaffected |
|
No data.
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:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/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
No CVSS v3.1 score for this CVE.
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
TotalDecision
n/aAssessed Aug 6, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2025–2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (8 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 1.69% (0.01694) | 76.31th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.12% (0.01124) | 61.92th | v5 (v2026.06.15) |
| May 28, 2026 | 78.70% (0.78701) | 99.07th | v4 (v2025.03.14) |
| Apr 17, 2026 | 64.68% (0.64683) | 98.47th | v4 (v2025.03.14) |
| Dec 28, 2025 | 61.83% (0.61828) | 98.25th | v4 (v2025.03.14) |
| Dec 1, 2025 | 63.85% (0.63848) | 98.34th | v4 (v2025.03.14) |
| Oct 8, 2025 | 59.03% (0.59033) | 98.11th | v4 (v2025.03.14) |
| Aug 2, 2025 | 0.25% (0.00253) | 48.74th | v4 (v2025.03.14) |
References (5)
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/browser/synactis_connecttosynactis_bof.rb exploit
- https://www.exploit-db.com/exploits/25835 exploit
- https://www.fortiguard.com/encyclopedia/ips/35840/synactis-pdf-in-the-box-connecttosynactic-buffer-overflow third-party-advisory
- https://www.synactis.com/pdf-in-the-box.htm product
- https://www.vulncheck.com/advisories/synactis-pdf-in-the-box-connectosynactic-stack-based-buffer-overflow third-party-advisory
Change history (0)
No recorded changes yet.