CVE-2018-5206
CVE-2018-5206 is a critical-severity vulnerability in Irssi with a CVSS 3.x base score of 9.8. 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-476.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 2% (80th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-476
- Affected product: Irssi
- Published:
- Last modified:
Description
When the channel topic is set without specifying a sender, Irssi before 1.0.6 may dereference a NULL pointer.
Frequently asked questions
- What is CVE-2018-5206?
- When the channel topic is set without specifying a sender, Irssi before 1.0.6 may dereference a NULL pointer.
- How severe is CVE-2018-5206?
- CVE-2018-5206 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2018-5206 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-5206?
- CVE-2018-5206 primarily affects Irssi. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2018-5206?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2018-5206 published?
- CVE-2018-5206 was published on 2018-01-06 and last updated on 2026-06-17.
References
Affected products (2)
- cpe:2.3:a:irssi:irssi:*:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
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