How severe is CVE-2021-20435?

CVE-2021-20435 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-20435 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-20435?

CVE-2021-20435 affects Ibm Security Verify Bridge. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-20435?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-20435 published?

CVE-2021-20435 was published on 2021-09-23 and last updated on 2026-06-17.

CVE-2021-20435

CVE-2021-20435 is a medium-severity vulnerability in Ibm Security Verify Bridge with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-295.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Ibm Security Verify Bridge
Published: 2021-09-23
Last modified: 2026-06-17

Description

IBM Security Verify Bridge 1.0.5.0 does not properly validate a certificate which could allow a local attacker to obtain sensitive information that could aid in further attacks against the system. IBM X-Force ID: 196355.

Frequently asked questions

What is CVE-2021-20435?: IBM Security Verify Bridge 1.0.5.0 does not properly validate a certificate which could allow a local attacker to obtain sensitive information that could aid in further attacks against the system. IBM X-Force ID: 196355.
How severe is CVE-2021-20435?: CVE-2021-20435 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-20435 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20435?: CVE-2021-20435 affects Ibm Security Verify Bridge. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-20435?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-20435 published?: CVE-2021-20435 was published on 2021-09-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ibm:security_verify_bridge:*:*:*:*:*:*:*:*

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