How severe is CVE-2021-34182?

CVE-2021-34182 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-2021-34182 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-34182?

CVE-2021-34182 affects Ttyd Project Ttyd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-34182?

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-2021-34182 published?

CVE-2021-34182 was published on 2023-02-17 and last updated on 2026-06-17.

CVE-2021-34182

CVE-2021-34182 is a critical-severity vulnerability in Ttyd Project Ttyd 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-276.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-276
Affected product: Ttyd Project Ttyd
Published: 2023-02-17
Last modified: 2026-06-17

Description

An issue in ttyd v.1.6.3 allows attacker to execute arbitrary code via default configuration permissions.

Frequently asked questions

What is CVE-2021-34182?: An issue in ttyd v.1.6.3 allows attacker to execute arbitrary code via default configuration permissions.
How severe is CVE-2021-34182?: CVE-2021-34182 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-2021-34182 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-34182?: CVE-2021-34182 affects Ttyd Project Ttyd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-34182?: 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-2021-34182 published?: CVE-2021-34182 was published on 2023-02-17 and last updated on 2026-06-17.

References

https://github.com/tsl0922/ttyd/issues/692

Affected products (1)

cpe:2.3:a:ttyd_project:ttyd:1.6.3:*:*:*:*:*:*:*

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