High severity · published Mar 8, 2021
CVE-2021-26788
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)
7.5
CVSS
1.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 68% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CY
Cyclonetcp · Oryx-embedded
1.7.6 through 2.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26788
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-26788
Patch
https://github.com/Oryx-Embedded/CycloneTCP/commit/de5336016edbe1e90327d0ed1cba5c4e49114366?branch=de5336016edbe1e90327d0ed1cba5c4e49114366&diff=split
More from Cyclonetcp
9.8
CVE-2020-27631
In Oryx CycloneTCP 1.9.6, TCP ISNs are improperly random