How severe is CVE-2020-10827?

CVE-2020-10827 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-2020-10827 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 21% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-10827?

CVE-2020-10827 primarily affects Draytek Vigor300b Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-10827?

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-2020-10827 published?

CVE-2020-10827 was published on 2020-03-26 and last updated on 2026-06-17.

CVE-2020-10827

CVE-2020-10827 is a critical-severity vulnerability in Draytek Vigor300b Firmware with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 21% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 21% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Draytek Vigor300b Firmware
Published: 2020-03-26
Last modified: 2026-06-17

Description

A stack-based buffer overflow in apmd on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1 allows remote attackers to achieve code execution via a remote HTTP request.

Frequently asked questions

What is CVE-2020-10827?: A stack-based buffer overflow in apmd on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1 allows remote attackers to achieve code execution via a remote HTTP request.
How severe is CVE-2020-10827?: CVE-2020-10827 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-2020-10827 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 21% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-10827?: CVE-2020-10827 primarily affects Draytek Vigor300b Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-10827?: 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-2020-10827 published?: CVE-2020-10827 was published on 2020-03-26 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:o:draytek:vigor300b_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:draytek:vigor3900_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:draytek:vigor2960_firmware:*:*:*:*:*:*:*:*

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