Security readout for executives and security teams
CVE-2020-2757 is an Oracle Java serialization flaw that can let an unauthenticated network attacker cause a limited denial of service. The published impact is availability only, with no confidentiality or integrity impact stated. Exploitation is described as difficult, and the source bundle does not show known active exploitation. Exposure is most likely where affected Java runtimes remain deployed and process untrusted network-supplied serialized data or affected serialization APIs. Legacy Java Web Start, applet, server-side Java, and Java SE Embedded environments should be checked. Handle through normal patch management unless affected Java runtimes are exposed to untrusted network input in business-critical services. The urgency is lower than code-execution flaws, but unpatched Java stacks can still create avoidable availability risk. Mitigation focus: Apply Oracle April 2020 CPU or relevant vendor Java/OpenJDK security updates.; Update affected Debian, Ubuntu, Fedora, openSUSE, Gentoo, or NetApp-supported packages where applicable.; Check vendor guidance for exact fixed package versions before remediation..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2020-2757 mapping review
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Open ATT&CK lookup- Severity
- Low
- CVSS
- 3.7 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L2.21.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
3.7LowVector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://www.oracle.com/security-alerts/cpuapr2020.htmlCVE reference · x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20200416-0004/CVE reference · x_refsource_CONFIRM
- DSA-4662CVE reference · vendor-advisory, x_refsource_DEBIAN
- USN-4337-1CVE reference · vendor-advisory, x_refsource_UBUNTU
- [debian-lts-announce] 20200429 [SECURITY] [DLA 2193-1] openjdk-7 security updateCVE reference · mailing-list, x_refsource_MLIST
- DSA-4668CVE reference · vendor-advisory, x_refsource_DEBIAN
- FEDORA-2020-5386fe3bbbCVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2020-21ca991b3bCVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2020-a60ad9d4ecCVE reference · vendor-advisory, x_refsource_FEDORA
- GLSA-202006-22CVE reference · vendor-advisory, x_refsource_GENTOO
- https://kc.mcafee.com/corporate/index?page=content&id=SB10332CVE reference · x_refsource_CONFIRM
- GLSA-202209-15CVE reference · vendor-advisory, x_refsource_GENTOO
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.