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CVE-2020-8479

30
FAUCET Score

CVE-2020-8479 is an XML External Entity (XXE) Injection vulnerability in the Central Licensing Server component of numerous ABB products, including ABB Ability System 800xA, Compact HMI, and Symphony Plus. This critical vulnerability (CVSS 9.8) allows an unauthenticated attacker to remotely read or call arbitrary files from the license server or network, and disrupt license handling. While the EPSS score is low and there's no evidence of active exploitation, public exploit code, or significant community discussion, the potential for complete compromise of confidentiality, integrity, and availability is high.

Impacted Technologies

VendorProductVersion(s)CPE
5.1CPE matchmatch criteria
cpe:2.3:a:abb:800xa_system:5.1:-:*:*:*:*:*:*
5.1CPE matchmatch criteria
cpe:2.3:a:abb:800xa_system:5.1:feature_pack_4:*:*:*:*:*:*
5.1CPE matchmatch criteria
cpe:2.3:a:abb:800xa_system:5.1:feature_pack_4_revision_d:*:*:*:*:*:*
5.1CPE matchmatch criteria
cpe:2.3:a:abb:800xa_system:5.1:revision_a:*:*:*:*:*:*
5.1CPE matchmatch criteria
cpe:2.3:a:abb:800xa_system:5.1:revision_b:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.4CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
5.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.20%
Probability of exploitation in next 30 days
EPSS Percentile
80.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0220 is in the 70th 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

Remediation records are not available for this CVE.

References

search.abb.com / library/Download.aspx
Vendor Advisory
search.abb.com / library/Download.aspx
Vendor Advisory
search.abb.com / library/Download.aspx