How severe is CVE-2016-1561?

CVE-2016-1561 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 high, integrity none, and availability none.

Is CVE-2016-1561 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 74% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-1561?

CVE-2016-1561 primarily affects Exagrid Ex3000 Firmware. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-1561?

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-2016-1561 published?

CVE-2016-1561 was published on 2017-04-21 and last updated on 2026-06-17.

CVE-2016-1561

CVE-2016-1561 is a high-severity vulnerability in Exagrid Ex3000 Firmware with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 74% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-200.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 74% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Exagrid Ex3000 Firmware
Published: 2017-04-21
Last modified: 2026-06-17

Description

ExaGrid appliances with firmware before 4.8 P26 have a default SSH public key in the authorized_keys file for root, which allows remote attackers to obtain SSH access by leveraging knowledge of a private key from another installation or a firmware image.

Frequently asked questions

What is CVE-2016-1561?: ExaGrid appliances with firmware before 4.8 P26 have a default SSH public key in the authorized_keys file for root, which allows remote attackers to obtain SSH access by leveraging knowledge of a private key from another installation or a firmware image.
How severe is CVE-2016-1561?: CVE-2016-1561 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 high, integrity none, and availability none.
Is CVE-2016-1561 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 74% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-1561?: CVE-2016-1561 primarily affects Exagrid Ex3000 Firmware. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-1561?: 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-2016-1561 published?: CVE-2016-1561 was published on 2017-04-21 and last updated on 2026-06-17.

References

Affected products (8)

cpe:2.3:o:exagrid:ex3000_firmware:4.8:*:*:*:*:*:*:*
cpe:2.3:o:exagrid:ex5000_firmware:4.8:*:*:*:*:*:*:*
cpe:2.3:o:exagrid:ex7000_firmware:4.8:*:*:*:*:*:*:*
cpe:2.3:o:exagrid:ex10000e_firmware:4.8:*:*:*:*:*:*:*
cpe:2.3:o:exagrid:ex13000e_firmware:4.8:*:*:*:*:*:*:*
cpe:2.3:o:exagrid:ex21000e_firmware:4.8:*:*:*:*:*:*:*
cpe:2.3:o:exagrid:ex32000e_firmware:4.8:*:*:*:*:*:*:*
cpe:2.3:o:exagrid:ex40000e_firmware:4.8:*:*:*:*:*:*:*

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