How severe is CVE-2012-1326?

CVE-2012-1326 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2012-1326 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2012-1326?

CVE-2012-1326 affects Cisco Ironport Web Security Appliance. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2012-1326?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2012-1326 published?

CVE-2012-1326 was published on 2020-01-15 and last updated on 2026-06-16.

CVE-2012-1326

CVE-2012-1326 is a high-severity vulnerability in Cisco Ironport Web Security Appliance with a CVSS 3.x base score of 7.4. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.4)
CVSS v2: 5.8
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Cisco Ironport Web Security Appliance
Published: 2020-01-15
Last modified: 2026-06-16

Description

Cisco IronPort Web Security Appliance up to and including 7.5 does not validate the basic constraints of the certificate authority which could lead to MITM attacks

Frequently asked questions

What is CVE-2012-1326?: Cisco IronPort Web Security Appliance up to and including 7.5 does not validate the basic constraints of the certificate authority which could lead to MITM attacks
How severe is CVE-2012-1326?: CVE-2012-1326 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2012-1326 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2012-1326?: CVE-2012-1326 affects Cisco Ironport Web Security Appliance. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2012-1326?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2012-1326 published?: CVE-2012-1326 was published on 2020-01-15 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:cisco:ironport_web_security_appliance:*:*:*:*:*:*:*:*

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