ExploitedIn CISA KEVFix available

CVE-2017-7921

Exploitation confirmed. First attested on 2023-10-16 by CISA-ADP, CISA KEV, GCVE · kevintel, GCVE · shadowserver.

Published2017-05-06
WeaknessCWE-287

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An Improper Authentication issue was discovered in Hikvision DS-2CD2xx2F-I Series V5.2.0 build 140721 to V5.4.0 build 160530, DS-2CD2xx0F-I Series V5.2.0 build 140721 to V5.4.0 Build 160401, DS-2CD2xx2FWD Series V5.3.1 build 150410 to V5.4.4 Build 161125, DS-2CD4x2xFWD Series V5.2.0 build 140721 to V5.4.0 Build 160414, DS-2CD4xx5 Series V5.2.0 build 140721 to V5.4.0 Build 160421, DS-2DFx Series V5.2.0 build 140805 to V5.4.5 Build 160928, and DS-2CD63xx Series V5.0.9 build 140305 to V5.3.5 Build 160106 devices. The improper authentication vulnerability occurs when an application does not adequately or correctly authenticate users. This may allow a malicious user to escalate his or her privileges on the system and gain access to sensitive information.

Timeline

dates in UTC

2017-05-0600:29CVE publishedNVD
2023-10-1612:46Listed as exploited by GCVEGCVE
2023-10-1612:46Exploitation first reportedGCVE
2026-03-05Added to the CISA KEV catalogCISA KEV
2026-03-0519:13SSVC exploitation set to activeCISA-ADP
2026-10-2319:23First public proof of conceptPoC-in-GitHub
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-7921?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-7921?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Hikvision ds-2cd2032-i firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Hikvision ds-2cd2112-i firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Hikvision ds-2cd2132-i firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

55 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-17-124-01 CISA7 known affected
Hikvision Cameras
DS-2CD2xx2FWD Series: V5.3.1 build 150410 to V5.4.4 Build 161125 · DS- 2CD4x2xFWD Series: V5.2.0 build 140721 to V5.4.0 Build 160414 · DS-2CD4xx5 Series: V5.2.0 build 140721 to V5.4.0 Build 160421 · +4 more

Full record on NVD

Fix

CISA’s required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.due 2026-03-26
Vendor fix CISA ICSA-17-124-01 · 7 productsDS-2CD2xx2F-I Series: V5.4.5 build 170123 and later
Mitigation from the vendor CISA ICSA-17-124-01 · 7 productsHikvision has released updates to mitigate the improper authentication vulnerability in cameras sold through authorized distributers. Hikvision has not mitigated the password in configuration file vulnerability.
Mitigation from the vendor CISA ICSA-17-124-01 · 7 productsHowever, Hikvision is aware of so-called “grey market” cameras which are sold via unauthorized channels. These cameras often use unauthorized firmware created by sources outside of Hikvision. In the case of these “grey market” devices, updating the firmware may result in converting the camera's int…
Mitigation from the vendor CISA ICSA-17-124-01 · 7 productsIn the Hikvision Unauthorized Distributors Notice, Hikvision encourages users to use devices sold by authorized distributers rather than so-called “grey market” devices
Mitigation from the vendor CISA ICSA-17-124-01 · 7 productsDS-2CD2xx0F-I Series: V5.4.5 Build 170123 and later
Mitigation from the vendor CISA ICSA-17-124-01 · 7 productsDS-2CD2xx2FWD Series: V5.4.5 Build 170124 and later

Advisories and patches

www.hikvision.comPatch · Vendor Advisory

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 20 repositories, unverifiedJrDw0/CVE-2017-7921-EXPBurnyMcDull/CVE-2017-7921MisakaMikato/cve-2017-7921-golangchrisjd20/hikvision_CVE-2017-7921_auth_bypass_config_decryptorp4tq/hikvision_CVE-2017-7921_auth_bypass_config_decryptor

CISA Known Exploited Vulnerability

Date Added: 2026-03-05
Patch Due Date: 2026-03-26
Ransomware Use: Unknown
Required Action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Sources

CISA KEVKEV entry2026-03-05
GCVEexploitation2023-10-16
CISA-ADPSSVC decisionactive2026-03-05
OpenCVESSVC decisionactive—
CISA-ADPCVSS 3.19.82026-03-05
NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
CNAweakness (CWE)CWE-287read 2026-10-23
NVDweakness (CWE)CWE-287read 2026-10-23
FIRST EPSSEPSS score99.9 %read 2026-10-23
PoC-in-GitHubproof of concept20read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2017-05-06
Last Modified: 2026-06-17
NVD status: Analyzed

Frequently asked questions

What is CVE-2017-7921?

Is CVE-2017-7921 actively exploited?

Yes. CVE-2017-7921 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-03-26.

What is the CVSS score for CVE-2017-7921?

CVE-2017-7921 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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