How severe is CVE-2019-9677?

CVE-2019-9677 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-2019-9677 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-9677?

CVE-2019-9677 primarily affects Dahuasecurity Ipc-hdw1x2x Firmware. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-9677?

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-2019-9677 published?

CVE-2019-9677 was published on 2019-09-18 and last updated on 2026-06-17.

CVE-2019-9677

CVE-2019-9677 is a critical-severity vulnerability in Dahuasecurity Ipc-hdw1x2x Firmware 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-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Dahuasecurity Ipc-hdw1x2x Firmware
Published: 2019-09-18
Last modified: 2026-06-17

Description

The specific fields of CGI interface of some Dahua products are not strictly verified, an attacker can cause a buffer overflow by constructing malicious packets. Affected products include: IPC-HDW1X2X,IPC-HFW1X2X,IPC-HDW2X2X,IPC-HFW2X2X,IPC-HDW4X2X,IPC-HFW4X2X,IPC-HDBW4X2X,IPC-HDW5X2X,IPC-HFW5X2X for versions which Build time is before August 18, 2019.

Frequently asked questions

What is CVE-2019-9677?: The specific fields of CGI interface of some Dahua products are not strictly verified, an attacker can cause a buffer overflow by constructing malicious packets. Affected products include: IPC-HDW1X2X,IPC-HFW1X2X,IPC-HDW2X2X,IPC-HFW2X2X,IPC-HDW4X2X,IPC-HFW4X2X,IPC-HDBW4X2X,IPC-HDW5X2X,IPC-HFW5X2X for versions which Build time is before August 18, 2019.
How severe is CVE-2019-9677?: CVE-2019-9677 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-2019-9677 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-9677?: CVE-2019-9677 primarily affects Dahuasecurity Ipc-hdw1x2x Firmware. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-9677?: 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-2019-9677 published?: CVE-2019-9677 was published on 2019-09-18 and last updated on 2026-06-17.

References

https://www.dahuasecurity.com/support/cybersecurity/details/637

Affected products (9)

cpe:2.3:o:dahuasecurity:ipc-hdw1x2x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:ipc-hfw1x2x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:ipc-hdw2x2x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:ipc-hfw2x2x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:ipc-hdw4x2x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:ipc-hfw4x2x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:ipc-hdbw4x2x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:ipc-hdw5x2x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dahuasecurity:ipc-hfw5x2x_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Dahuasecurity Ipc-hdw1x2x Firmware

CVE-2019-9679 — High (CVSS 8.8): Some of Dahua's Debug functions do not have permission separation. Low-privileged users can use the Debug function…
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CVE-2019-9681 — Medium (CVSS 5.3): Online upgrade information in some firmware packages of Dahua products is not encrypted. Attackers can obtain this…

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