How severe is CVE-2018-12666?

CVE-2018-12666 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-2018-12666 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-12666?

CVE-2018-12666 primarily affects Sv3c H.264 Poe Ip Camera Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-12666?

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-2018-12666 published?

CVE-2018-12666 was published on 2018-10-19 and last updated on 2026-06-17.

CVE-2018-12666

CVE-2018-12666 is a critical-severity vulnerability in Sv3c H.264 Poe Ip Camera 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-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Sv3c H.264 Poe Ip Camera Firmware
Published: 2018-10-19
Last modified: 2026-06-17

Description

SV3C L-SERIES HD CAMERA V2.3.4.2103-S50-NTD-B20170508B devices improperly identifies users only by the authentication level sent in the cookies, which allow remote attackers to bypass authentication and gain administrator access by setting the authLevel cookie to 255.

Frequently asked questions

What is CVE-2018-12666?: SV3C L-SERIES HD CAMERA V2.3.4.2103-S50-NTD-B20170508B devices improperly identifies users only by the authentication level sent in the cookies, which allow remote attackers to bypass authentication and gain administrator access by setting the authLevel cookie to 255.
How severe is CVE-2018-12666?: CVE-2018-12666 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-2018-12666 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-12666?: CVE-2018-12666 primarily affects Sv3c H.264 Poe Ip Camera Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-12666?: 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-2018-12666 published?: CVE-2018-12666 was published on 2018-10-19 and last updated on 2026-06-17.

References

https://www.bishopfox.com/news/2018/10/sv3c-l-series-hd-camera-multiple-vulnerabilities/

Affected products (2)

cpe:2.3:o:sv3c:h.264_poe_ip_camera_firmware:v2.3.4.2103-s50-ntd-b20170508b:*:*:*:*:*:*:*
cpe:2.3:o:sv3c:h.264_poe_ip_camera_firmware:v2.3.4.2103-s50-ntd-b20170823b:*:*:*:*:*:*:*

More vulnerabilities in Sv3c H.264 Poe Ip Camera Firmware

CVE-2018-12671 — Critical (CVSS 9.8): An attacker with remote access to the SV3C HD Camera (L-SERIES V2.3.4.2103-S50-NTD-B20170508B and…
CVE-2018-12670 — Critical (CVSS 9.8): SV3C L-SERIES HD CAMERA V2.3.4.2103-S50-NTD-B20170508B and V2.3.4.2103-S50-NTD-B20170823B devices allow OS Command…
CVE-2018-12668 — Critical (CVSS 9.8): SV3C L-SERIES HD CAMERA V2.3.4.2103-S50-NTD-B20170508B and V2.3.4.2103-S50-NTD-B20170823B devices have a Hard-coded…
CVE-2018-12667 — Critical (CVSS 9.8): The SV3C HD Camera (L-SERIES V2.3.4.2103-S50-NTD-B20170508B and V2.3.4.2103-S50-NTD-B20170823B) is affected by an…
CVE-2018-12669 — High (CVSS 8.8): SV3C L-SERIES HD CAMERA V2.3.4.2103-S50-NTD-B20170508B and V2.3.4.2103-S50-NTD-B20170823B devices allow remote…
CVE-2018-12673 — High (CVSS 7.5): An attacker with remote access to the SV3C HD Camera (L-SERIES V2.3.4.2103-S50-NTD-B20170508B and…

All CVEs affecting Sv3c H.264 Poe Ip Camera Firmware →

Other CWE-287 (Improper Authentication) vulnerabilities

CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →