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CVE-2020-9493

34
FAUCET Score

CVE-2020-9493 is a critical deserialization vulnerability in Apache Chainsaw versions prior to 2.1.0, also impacting related Apache Log4j and Reload4j components. This flaw allows for unauthenticated, remote code execution with low attack complexity, posing a severe risk to confidentiality, integrity, and availability. While no public exploits or active exploitation have been observed, and community discussion is minimal, its critical CVSS score of 9.8 warrants immediate patching.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.1.0CPE matchmatch criteria
cpe:2.3:a:apache:chainsaw:*:*:*:*:*:*:*:*
>= 1.2, < 2.0CPE matchmatch criteria
cpe:2.3:a:apache:log4j:*:*:*:*:*:*:*:*
< 1.2.18.1CPE matchmatch criteria
cpe:2.3:a:qos:reload4j:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.61%
Probability of exploitation in next 30 days
EPSS Percentile
90.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0461 is in the 84th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Remediation records are not available for this CVE.

References

lists.apache.org / thread.html/r50d389c613ba6062a26aa57e163c09bfee4ff2d95d67331d75265b83%40%3Cannounce.apache.org%3E
openwall.com / lists/oss-security/2021/06/16/1
Mailing ListTool Signature
openwall.com / lists/oss-security/2021/06/16/1
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2022/01/18/5
Mailing ListThird Party Advisory