How severe is CVE-2019-12953?

CVE-2019-12953 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2019-12953 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-12953?

CVE-2019-12953 affects Dropbear Ssh Project Dropbear Ssh. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-12953?

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

When was CVE-2019-12953 published?

CVE-2019-12953 was published on 2020-12-30 and last updated on 2026-06-17.

CVE-2019-12953

CVE-2019-12953 is a medium-severity vulnerability in Dropbear Ssh Project Dropbear Ssh with a CVSS 3.x base score of 5.3. 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-203.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-203
Affected product: Dropbear Ssh Project Dropbear Ssh
Published: 2020-12-30
Last modified: 2026-06-17

Description

Dropbear 2011.54 through 2018.76 has an inconsistent failure delay that may lead to revealing valid usernames, a different issue than CVE-2018-15599.

Frequently asked questions

What is CVE-2019-12953?: Dropbear 2011.54 through 2018.76 has an inconsistent failure delay that may lead to revealing valid usernames, a different issue than CVE-2018-15599.
How severe is CVE-2019-12953?: CVE-2019-12953 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2019-12953 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-12953?: CVE-2019-12953 affects Dropbear Ssh Project Dropbear Ssh. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-12953?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-12953 published?: CVE-2019-12953 was published on 2020-12-30 and last updated on 2026-06-17.

References

https://matt.ucc.asn.au/dropbear/CHANGES

Affected products (1)

cpe:2.3:a:dropbear_ssh_project:dropbear_ssh:*:*:*:*:*:*:*:*

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