VirtualSquare picoTCP (aka PicoTCP-NG) through 2.1 does not properly check whether header…
Priority MEDIUM 40CWE-754Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
VirtualSquare picoTCP (aka PicoTCP-NG) through 2.1 does not properly check whether header sizes would result in accessing data outside of a packet.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00638 50th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:virtualsquare:picotcp:*:*:*:*:*:*:*:* | up to 2.1 | Vulnerable | Virtualsquare |
- cpe:2.3:a:virtualsquare:picotcp:*:*:*:*:*:*:*:* Versions up to 2.1 Vulnerable ·Virtualsquare
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-35849
- 2026-10-03 Alias added: GHSA-hjwh-ffhj-2hxf
- 2026-10-25 EPSS moved to the 50th–90th percentile
References
More Virtualsquare Picotcp vulnerabilities
- TI-2023-17923 VirtualSquare picoTCP (aka PicoTCP-NG) through 2.1 lacks certain size calculations before… CVSS 3.1HIGH 7.5
- TI-2023-17922 VirtualSquare picoTCP (aka PicoTCP-NG) through 2.1 does not have an MSS lower bound (e.g., it could be zero). CVSS 3.1HIGH 7.5
- TI-2023-17921 VirtualSquare picoTCP (aka PicoTCP-NG) through 2.1 does not check the transport layer… CVSS 3.1HIGH 7.5
Sources
- CVE-2023-35849 · CVE Program
- CVE-2023-35849 · NVD
- FIRST EPSS
- GHSA-hjwh-ffhj-2hxf · GitHub Advisory Database · CC BY 4.0
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