How severe is CVE-2018-9849?

CVE-2018-9849 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-9849 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-9849?

CVE-2018-9849 affects Pulsesecure Pulse Connect Secure. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-9849?

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

When was CVE-2018-9849 published?

CVE-2018-9849 was published on 2018-05-10 and last updated on 2026-06-17.

CVE-2018-9849

CVE-2018-9849 is a medium-severity vulnerability in Pulsesecure Pulse Connect Secure 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.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Pulsesecure Pulse Connect Secure
Published: 2018-05-10
Last modified: 2026-06-17

Description

Pulse Secure Pulse Connect Secure 8.1.x before 8.1R14, 8.2.x before 8.2R11, and 8.3.x before 8.3R5 do not properly process nested XML entities, which allows remote attackers to cause a denial of service (memory consumption and memory errors) via a crafted XML document.

Frequently asked questions

What is CVE-2018-9849?: Pulse Secure Pulse Connect Secure 8.1.x before 8.1R14, 8.2.x before 8.2R11, and 8.3.x before 8.3R5 do not properly process nested XML entities, which allows remote attackers to cause a denial of service (memory consumption and memory errors) via a crafted XML document.
How severe is CVE-2018-9849?: CVE-2018-9849 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-9849 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-9849?: CVE-2018-9849 affects Pulsesecure Pulse Connect Secure. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-9849?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-9849 published?: CVE-2018-9849 was published on 2018-05-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:pulsesecure:pulse_connect_secure:*:*:*:*:*:*:*:*

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