How severe is CVE-2021-36260?

CVE-2021-36260 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-2021-36260 being actively exploited?

Yes. CVE-2021-36260 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-01-10, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2021-36260?

CVE-2021-36260 primarily affects Hikvision Ds-2cd2026g2-iu/sl Firmware. In total, 256 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-36260?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2021-36260 have an EU (EUVD) identifier?

Yes. CVE-2021-36260 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-22880. It is also flagged as exploited in the EUVD (since 2022-01-10).

When was CVE-2021-36260 published?

CVE-2021-36260 was published on 2021-09-22 and last updated on 2026-06-17.

CVE-2021-36260

CVE-2021-36260 is a critical-severity vulnerability in Hikvision Ds-2cd2026g2-iu/sl Firmware with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-01-10). The underlying weakness is classified as CWE-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 9.3
EPSS exploit prediction: 100% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-01-10)
EU (EUVD) id: EUVD-2021-22880
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-01-10)
Weakness: CWE-78
Affected product: Hikvision Ds-2cd2026g2-iu/sl Firmware
Published: 2021-09-22
Last modified: 2026-06-17

Description

A command injection vulnerability in the web server of some Hikvision product. Due to the insufficient input validation, attacker can exploit the vulnerability to launch a command injection attack by sending some messages with malicious commands.

Frequently asked questions

What is CVE-2021-36260?: A command injection vulnerability in the web server of some Hikvision product. Due to the insufficient input validation, attacker can exploit the vulnerability to launch a command injection attack by sending some messages with malicious commands.
How severe is CVE-2021-36260?: CVE-2021-36260 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-2021-36260 being actively exploited?: Yes. CVE-2021-36260 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-01-10, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2021-36260?: CVE-2021-36260 primarily affects Hikvision Ds-2cd2026g2-iu/sl Firmware. In total, 256 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-36260?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2021-36260 have an EU (EUVD) identifier?: Yes. CVE-2021-36260 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-22880. It is also flagged as exploited in the EUVD (since 2022-01-10).
When was CVE-2021-36260 published?: CVE-2021-36260 was published on 2021-09-22 and last updated on 2026-06-17.

References

Affected products (256)

cpe:2.3:o:hikvision:ds-2cd2026g2-iu\/sl_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2046g2-iu\/sl_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2066g2-i\(u\)_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2066g2-iu\/sl_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2086g2-i\(u\)_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2086g2-iu\/sl_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2166g2-i\(su\)_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2186g2-i\(su\)_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2186g2-isu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2326g2-isu\/sl_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2346g2-isu\/sl_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2366g2-i\(u\)_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2366g2-isu\/sl_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2386g2-i\(u\)_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2386g2-isu\/sl_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2426g2-i_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2446g2-i_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2526g2-i\(s\)_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2526g2-is_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2546g2-i\(s\)_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2566g2-i\(s\)_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2586g2-i\(s\)_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2626g2-izsu\/sl_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2646g2-izsu\/sl_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2666g2-izs_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2666g2-izsu\/sl_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2686g2-izs_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2686g2-izsu\/sl_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2766g2-izs_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2786g2-izs_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2027g2-l\(u\)_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2047g2-l\(u\)_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2027g2-lu\/sl_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2087g2-l\(u\)_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2127g2-\(-su\)_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2147g2-l\(su\)_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2327g2-l\(u\)_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2347g2-l\(u\)_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2347g2-lsu\/sl_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:hikvision:ds-2cd2387g2-l\(u\)_firmware:-:*:*:*:*:*:*:*

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