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CVE-2020-2756

14
FAUCET Score

CVE-2020-2756 is a low-severity vulnerability in the Serialization component of Oracle Java SE and Java SE Embedded, affecting versions 7u251, 8u241, 11.0.6, and 14. This vulnerability allows an unauthenticated attacker with network access to cause a partial denial of service (DoS) in affected Java deployments. While difficult to exploit, it can be triggered via multiple protocols, including through sandboxed Java Web Start applications, applets, or by supplying data to APIs. The CVSS 3.0 Base Score is 3.7 (Low), indicating a low impact on availability with no confidentiality or integrity impacts. The attack complexity is high, and no user interaction is required. Despite its age, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage, suggesting a low current threat level.

Impacted Technologies

VendorProductVersion(s)CPE
1.7.0CPE matchmatch criteria
cpe:2.3:a:oracle:jdk:1.7.0:update251:*:*:*:*:*:*
1.8.0CPE matchmatch criteria
cpe:2.3:a:oracle:jdk:1.8.0:update241:*:*:*:*:*:*
11.0.6CPE matchmatch criteria
cpe:2.3:a:oracle:jdk:11.0.6:*:*:*:*:*:*:*
14.0.0CPE matchmatch criteria
cpe:2.3:a:oracle:jdk:14.0.0:*:*:*:*:*:*:*
1.7.0CPE matchmatch criteria
cpe:2.3:a:oracle:jre:1.7.0:update251:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

3.7LOW

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.2
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.21%
Probability of exploitation in next 30 days
EPSS Percentile
89.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0421 is in the 90th percentile among its peer group of 1,506 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (15)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.0 Update Services for SAP SolutionsFixed in: java-11-openjdk-1:11.0.7.10-1.el8_0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: java-1.8.0-openjdk-1:1.8.0.252.b09-2.el6_10
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: java-1.7.0-openjdk-1:1.7.0.261-2.6.22.1.el6_10
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6 SupplementaryFixed in: java-1.7.1-ibm-1:1.7.1.4.65-1jpp.1.el6_10
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6 SupplementaryFixed in: java-1.8.0-ibm-1:1.8.0.6.10-1jpp.1.el6_10
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: java-1.7.0-openjdk-1:1.7.0.261-2.6.22.2.el7_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: java-11-openjdk-1:11.0.7.10-4.el7_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: java-1.8.0-openjdk-1:1.8.0.252.b09-2.el7_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7 SupplementaryFixed in: java-1.8.0-ibm-1:1.8.0.6.10-1jpp.1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7 SupplementaryFixed in: java-1.7.1-ibm-1:1.7.1.4.65-1jpp.1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: java-11-openjdk-1:11.0.7.10-1.el8_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: java-1.8.0-openjdk-1:1.8.0.252.b09-2.el8_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: java-1.8.0-ibm-1:1.8.0.6.10-1.el8_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.0 Update Services for SAP SolutionsFixed in: java-1.8.0-openjdk-1:1.8.0.252.b09-2.el8_0
View patch
oraclevendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2020-2756Low

OpenJDK: Incorrect handling of references to uninitialized class descriptors during deserialization (Serialization, 8224541)

Apr 14, 2020

References

lists.opensuse.org / opensuse-security-announce/2020-06/msg00000.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2020-06/msg00023.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2020-06/msg00048.html
Mailing ListThird Party Advisory
kc.mcafee.com / corporate/index
Third Party Advisory
lists.debian.org / debian-lts-announce/2020/04/msg00024.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/CKAV6KFFAEANXAN73AFTGU7Z6YNRWCXQ
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/L7VHC4EW36KZEIDQ56RPCWBZCQELFFKN
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/NYHHHZRHXCBGRHGE5UP7UEB4IZ2QX536
security.gentoo.org / glsa/202006-22
Third Party Advisory
security.gentoo.org / glsa/202209-15
Third Party Advisory
security.netapp.com / advisory/ntap-20200416-0004
Third Party Advisory
usn.ubuntu.com / 4337-1
Third Party Advisory
debian.org / security/2020/dsa-4662
Third Party Advisory
debian.org / security/2020/dsa-4668
Third Party Advisory
oracle.com / security-alerts/cpuapr2020.html
Vendor Advisory