HIGH
CVE-2020-4135
NVD-CWE-noinfoPublished: February 19, 2020· Updated: Jun 17, 2026
7.5
CVSS v3.1
Official Description
IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, 11.1, and 11.5 could allow an unauthenticated user to send specially crafted packets to cause a denial of service from excessive memory usage.
Technical Analysis
CVE-2020-4135 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (6)
→
https://exchange.xforce.ibmcloud.com/vulnerabilities/173806VDB Entry · Vendor Advisory
→
https://security.netapp.com/advisory/ntap-20210108-0001/Third Party Advisory
→
https://www.ibm.com/support/pages/node/2876307Vendor Advisory
→
https://exchange.xforce.ibmcloud.com/vulnerabilities/173806VDB Entry · Vendor Advisory
→
https://security.netapp.com/advisory/ntap-20210108-0001/Third Party Advisory
→
https://www.ibm.com/support/pages/node/2876307Vendor Advisory
Quick Facts
CVE IDCVE-2020-4135
CVSS Score7.5 / 10
SeverityHIGH
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected4 vendor(s)
PublishedFeb 19, 2020
Related CVEs (NVD-CWE-noinfo)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-4135 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.