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CVE-2021-26788

HIGH
7.5
CVSS Score
Published: March 8, 2021 at 12:53 PM UTC
Updated: June 17, 2026 at 03:43 AM UTC
1 product affected across 1 vendorCyclonetcp

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Severity
HIGH7.5
Exploit prediction
EPSS 1%

Description

Oryx Embedded CycloneTCP 1.7.6 to 2.0.0, fixed in 2.0.2, is affected by incorrect input validation, which may cause a denial of service (DoS). To exploit the vulnerability, an attacker needs to have TCP connectivity to the target system. Receiving a maliciously crafted TCP packet from an unauthenticated endpoint is sufficient to trigger the bug.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Cyclonetcp· Oryx Embedded
95%
1.7.6 ≤ v ≤ 2.0.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/Oryx-Embedded/CycloneTCP/commit/de5336016edbe1e90327d0ed1cba5c4e49114366?branch=de5336016edbe1e90327d0ed1cba5c4e49114366&diff=split

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20

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