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CVE-2020-4462

26
FAUCET Score

CVE-2020-4462 describes an XML External Entity (XXE) injection vulnerability affecting IBM Sterling External Authentication Server and IBM Sterling Secure Proxy. This high-severity flaw (CVSS 8.2) allows a remote, unauthenticated attacker to expose sensitive information or cause a denial of service by consuming memory resources. While the vulnerability is critical, there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding it.

Impacted Technologies

VendorProductVersion(s)CPE
2.4.2.0CPE matchmatch criteria
cpe:2.3:a:ibm:sterling_external_authentication_server:2.4.2.0:*:*:*:*:*:*:*
2.4.3.2CPE matchmatch criteria
cpe:2.3:a:ibm:sterling_external_authentication_server:2.4.3.2:*:*:*:*:*:*:*
6.0.0.0CPE matchmatch criteria
cpe:2.3:a:ibm:sterling_external_authentication_server:6.0.0.0:*:*:*:*:*:*:*
6.0.1.0CPE matchmatch criteria
cpe:2.3:a:ibm:sterling_external_authentication_server:6.0.1.0:*:*:*:*:*:*:*
3.4.2.0CPE matchmatch criteria
cpe:2.3:a:ibm:sterling_secure_proxy:3.4.2.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
4.2
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.25%
Probability of exploitation in next 30 days
EPSS Percentile
87.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0325 is in the 77th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

exchange.xforce.ibmcloud.com / vulnerabilities/181482
VDB EntryVendor Advisory
ibm.com / support/pages/node/6249317
Vendor Advisory
ibm.com / support/pages/node/6249331
Vendor Advisory