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CVE-2020-4499

24
FAUCET Score

CVE-2020-4499 is a critical vulnerability affecting IBM Security Access Manager and IBM Security Verify Access, allowing an unauthorized public OAuth client to bypass authentication and gain access to applications. With a CVSS score of 9.8, it presents a high risk due to its network-based attack vector, low attack complexity, and potential for complete compromise of confidentiality, integrity, and availability. While no public exploits or active exploitation have been observed, and community discussion is minimal, the inherent severity warrants attention.

Impacted Technologies

VendorProductVersion(s)CPE
>= 9.0.7.0, < 9.0.7.2CPE matchmatch criteria
cpe:2.3:a:ibm:security_access_manager:*:*:*:*:*:*:*:*
>= 10.0.0, < 10.0.0.1CPE matchmatch criteria
cpe:2.3:a:ibm:security_verify_access:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.3HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
3.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.25%
Probability of exploitation in next 30 days
EPSS Percentile
66.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0125 is in the 52nd percentile among its peer group of 36,835 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

exchange.xforce.ibmcloud.com / vulnerabilities/182216
VDB EntryVendor Advisory
ibm.com / support/pages/node/6348046
PatchVendor Advisory