How severe is CVE-2018-7340?

CVE-2018-7340 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2018-7340 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-7340?

CVE-2018-7340 affects Cisco Duo Network Gateway. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-7340?

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-2018-7340 published?

CVE-2018-7340 was published on 2019-04-17 and last updated on 2026-06-17.

CVE-2018-7340

CVE-2018-7340 is a high-severity vulnerability in Cisco Duo Network Gateway with a CVSS 3.x base score of 7.5. 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-347.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-347
Affected product: Cisco Duo Network Gateway
Published: 2019-04-17
Last modified: 2026-06-17

Description

Duo Network Gateway 1.2.9 and earlier may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.

Frequently asked questions

What is CVE-2018-7340?: Duo Network Gateway 1.2.9 and earlier may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.
How severe is CVE-2018-7340?: CVE-2018-7340 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2018-7340 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-7340?: CVE-2018-7340 affects Cisco Duo Network Gateway. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-7340?: 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-2018-7340 published?: CVE-2018-7340 was published on 2019-04-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cisco:duo_network_gateway:*:*:*:*:*:*:*:*

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