No exploitation reported

CVE-2020-4462

No exploitation reported by the sources we read.

Published2020-07-16
WeaknessCWE-611

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

IBM Sterling External Authentication Server 6.0.1, 6.0.0, 2.4.3.2, and 2.4.2 and IBM Sterling Secure Proxy 6.0.1, 6.0.0, 3.4.3, and 3.4.2 are vulnerable to an XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory resources. IBM X-Force ID: 181482.

Timeline

dates in UTC

2020-07-1615:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-4462?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-4462?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Ibm sterling external authentication server

Branch	Affected	Fixed in	Source
2.4	= 2.4.2.0	no fix published	NVD
2.4	= 2.4.3.2	no fix published	NVD
6.0	= 6.0.0.0	no fix published	NVD
6.0	= 6.0.1.0	no fix published	NVD

Ibm sterling secure proxy

Branch	Affected	Fixed in	Source
3.4	= 3.4.2.0	no fix published	NVD
3.4	= 3.4.3.0	no fix published	NVD
6.0	= 6.0.0.0	no fix published	NVD
6.0	= 6.0.1.0	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

exchange.xforce.ibmcloud.comVendor Advisory
www.ibm.comVendor Advisory
www.ibm.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.18.2read 2026-10-23
CNACVSS 3.08.2read 2026-10-23
NVDCVSS 2.06.4read 2026-10-23
NVDweakness (CWE)CWE-611read 2026-10-23
FIRST EPSSEPSS score3.2 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L
Published: 2020-07-16
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-4462?

Is CVE-2020-4462 actively exploited?

Active exploitation of CVE-2020-4462 has not been confirmed. Its EPSS score was 3.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-4462?

CVE-2020-4462 has a CVSS v3 base score of 8.2 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L.

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