CVE-2017-7921

CRITICALNVD 9.810.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 10.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-03-05), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Exploited in the wild
10.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 100%CVSS: 9.8Exploit: cisa kev · ssvc active · Metasploit · epss top5pct · epss high · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.8
EG Score
10.0(high)
EG Risk
100(Act)
EG Risk 100/100SSVC: Act

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity100% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
100%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

May 6, 2017

Last Modified

June 17, 2026

Advisory Details (5)

Auto-updated Sep 14, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic
https://www.hikvision.com/en/support/cybersecurity/security-advisory/security-notification--privilege-escalating-vulnerability-in-cer/
generic
https://www.hikvision.com/cn/support/CybersecurityCenter/SecurityNotices/20170314/
generic

Hikvision Cameras | CISA

https://ics-cert.us-cert.gov/advisories/ICSA-17-124-01
generic🔴 Active Exploitation

CVE-2017-7921 - PSIRT.COM

http://www.securityfocus.com/bid/98313
generic
http://www.hikvision.com/us/about_10805.html

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 49× in last 7d / 206× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 785 total refreshes for this CVE.

  1. 2026-09-20 19:11 UTCGHSA enrichment
  2. 2026-09-20 15:25 UTCGHSA enrichment
  3. 2026-09-20 11:39 UTCGHSA enrichment
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  13. 2026-09-18 21:55 UTCGHSA enrichment
  14. 2026-09-18 19:20 UTCCISA KEV update
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  16. 2026-09-18 14:24 UTCGHSA enrichment
  17. 2026-09-18 14:15 UTCCISA KEV update
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  1. 2026-09-17 04:29 UTCGHSA enrichment
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  3. 2026-09-16 20:56 UTCGHSA enrichment
  4. 2026-09-16 16:57 UTCGHSA enrichment
  5. 2026-09-16 14:10 UTCCISA KEV update
  6. 2026-09-16 13:10 UTCGHSA enrichment
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  18. 2026-09-14 19:24 UTCCISA KEV update
  19. 2026-09-14 15:56 UTCGHSA enrichment
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  36. 2026-09-11 23:54 UTCGHSA enrichment
  37. 2026-09-11 20:08 UTCGHSA enrichment
  38. 2026-09-11 18:49 UTCCISA KEV update
  39. 2026-09-11 16:22 UTCGHSA enrichment
  40. 2026-09-11 12:35 UTCGHSA enrichment
  41. 2026-09-11 08:47 UTCGHSA enrichment
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  43. 2026-09-11 01:15 UTCGHSA enrichment
  44. 2026-09-10 21:29 UTCGHSA enrichment
  45. 2026-09-10 19:28 UTCCISA KEV update
  46. 2026-09-10 17:43 UTCGHSA enrichment
  47. 2026-09-10 13:57 UTCGHSA enrichment
  48. 2026-09-10 10:11 UTCGHSA enrichment
  49. 2026-09-10 06:25 UTCGHSA enrichment
  50. 2026-09-10 02:39 UTCGHSA enrichment
  51. 2026-09-09 22:53 UTCGHSA enrichment
  52. 2026-09-09 19:08 UTCCISA KEV update
  53. 2026-09-09 19:07 UTCGHSA enrichment
  54. 2026-09-09 15:21 UTCGHSA enrichment
  55. 2026-09-09 11:35 UTCGHSA enrichment
  56. 2026-09-09 07:49 UTCGHSA enrichment
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  58. 2026-09-09 00:16 UTCGHSA enrichment
  59. 2026-09-08 20:30 UTCGHSA enrichment
  60. 2026-09-08 18:54 UTCCISA KEV update
  61. 2026-09-08 16:44 UTCGHSA enrichment
  62. 2026-09-08 12:57 UTCGHSA enrichment
  63. 2026-09-08 09:08 UTCGHSA enrichment
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  73. 2026-09-06 19:15 UTCGHSA enrichment
  74. 2026-09-06 15:29 UTCGHSA enrichment
  75. 2026-09-06 11:42 UTCGHSA enrichment

Publicly available exploits

(10 references)

Working exploit code is in the public domain (10 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCWyl-cmd/CVE-2017-7921-Research-Toolkit
    First seen Jan 28, 2026

    用于借助FOFA快速测试海康威视的CVE-2017-7921漏洞，并且给出登陆账号和密码，并输出json文件。

    Open source ↗
  • GitHub PoCvoidsshadows/Hikvision-City-Hunter
    First seen Nov 19, 2025

    This tool is a modern evolution of older PoCs like those for CVE-2017-7921 and ICSA-17-124-01, updated for 2025 with live console output, threading for speed, and honeypot filtering (skips devices with >12 open ports). It's built for red teamers, bug bounty hunters, and security researchers to identify

    Open source ↗
  • GitHub PoCaengussong/hikvision_probe
    First seen Nov 26, 2024

    Identify hikvision ip and probe for cve-s (CVE-2017-7921, CVE-2022-28171, CVE-2021-36260)

    Open source ↗
  • GitHub PoCkooroshsanaei/HikVision-CVE-2017-7921
    First seen Jul 2, 2024

    Test For CVE-2017–7921;

    Open source ↗
  • GitHub PoCK3ysTr0K3R/CVE-2017-7921-EXPLOIT
    First seen Jul 24, 2023

    A PoC exploit for CVE-2017-7921 - Hikvision Camera Series Improper Authentication Vulnerability.

    Open source ↗
  • GitHub PoCkrypton612/hikivision
    First seen Jul 4, 2023

    CVE-2017-7921 EXPLOIT

    Open source ↗
  • GitHub PoC201646613/CVE-2017-7921
    First seen Jul 20, 2022

    CVE-2017-7921-EXP Hikvision camera

    Open source ↗
  • GitHub PoCalkaid176/CVE-2017-7921
    First seen Jul 20, 2022

    CVE-2017-7921-EXP Hikvision camera

    Open source ↗
  • GitHub PoCchrisjd20/hikvision_CVE-2017-7921_auth_bypass_config_decryptor
    First seen Jan 29, 2021

    This python file will decrypt the configurationFile used by hikvision cameras vulnerable to CVE-2017-7921.

    Open source ↗
  • GitHub PoCMisakaMikato/cve-2017-7921-golang
    First seen Nov 13, 2020

    Hikvision IP camera access bypass exploit, developed by golang.

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2017-7921?
CVE-2017-7921 is a critical vulnerability published on May 6, 2017. 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…
When was CVE-2017-7921 disclosed?
CVE-2017-7921 was first published in the National Vulnerability Database on May 6, 2017, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-7921 actively exploited?
Yes. CISA added CVE-2017-7921 to the Known Exploited Vulnerabilities catalog on March 5, 2026, affecting Hikvision Multiple Products. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2017-7921?
CVE-2017-7921 has a CVSS v3 base score of 9.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 10.0.
Which products are affected by CVE-2017-7921?
CVE-2017-7921 affects Hikvision Multiple Products. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2017-7921?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-7921, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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