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Actively exploited

CVE-2013-5223 D-Link DSL-2760U Gateway Cross-Site Scripting Vulnerability

A cross-site scripting (XSS) vulnerability exists in the D-Link DSL-2760U gateway, allowing remote authenticated users to inject arbitrary web script or HTML.

From the CISA KEV catalogue version 2026.11.06, with Cybergen analysis. Updated 6 Nov 2026.

Our Assessment

Should You Worry?

Patch nowCybergen assessment
  • CISA confirmed exploitation in the wild and added it to the Known Exploited Vulnerabilities catalogue on 25 Mar 2022.
  • Rated Medium severity (CVSS 5.4, scored by CISA).
  • This product type is often exposed to the internet, which is where attackers scan for it first.
  • It has been in the catalogue for 1,687 days. Systems still unpatched now have almost certainly been scanned for it.
The Vulnerability

What It Is

Multiple cross-site scripting (XSS) vulnerabilities in D-Link DSL-2760U Gateway (Rev. E1) allow remote authenticated users to inject arbitrary web script or HTML via the (1) ntpServer1 parameter to sntpcfg.cgi, username parameter to (2) ddnsmngr.cmd or (3) todmngr.tod, (4) TodUrlAdd parameter to urlfilter.cmd, (5) appName parameter to scprttrg.cmd, (6) fltName in an add action or (7) rmLst parameter in a remove action to scoutflt.cmd, (8) groupName parameter to portmapcfg.cmd, (9) snmpRoCommunity parameter to snmpconfig.cgi, (10) fltName parameter to scinflt.cmd, (11) PolicyName in an add action or (12) rmLst parameter in a remove action to prmngr.cmd, (13) ippName parameter to ippcfg.cmd, (14) smbNetBiosName or (15) smbDirName parameter to samba.cgi, or (16) wlSsid parameter to wlcfg.wl.

From Watch to Action

What To Do Now

  1. 1

    Find it

    Search your asset inventory and external attack surface for D-Link DSL-2760U. Include cloud images, appliances and anything a supplier runs for you.

    Attack Surface Management
  2. 2

    Fix it

    Apply updates per vendor instructions.

    Vulnerability Management
  3. 3

    Hunt for compromise

    If an affected system was reachable before you patched, assume it may have been hit. Check logs, new accounts, web shells and outbound connections from the date of exposure.

    Incident Response
  4. 4

    Prove it is fixed

    Rescan or test the system after patching. Upgrades that fail silently and forgotten secondary instances are common.

    Penetration Testing

Vendor Advisories

Regulation

The Compliance Clock

Cyber EssentialsCyber Essentials requires high and critical updates (CVSS 7.0 or above) within 14 days of release. Treat any exploited flaw the same way.NIS2If exploitation causes a significant incident, essential and important entities owe their CSIRT an early warning within 24 hours and a notification within 72 hours.DORAFinancial entities must classify ICT incidents and send an initial notification for a major incident within strict deadlines, with exploited flaws a common cause.US federal (BOD 22-01)Federal civilian agencies had until 15 Apr 2022 to remediate. A sensible benchmark for everyone else.

General guidance, not legal advice. Your obligations depend on your sector, scope and jurisdiction.

Stay Ahead

More Exploited D-Link Flaws

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CVE-2025-29635D-Link DIR-823X Command Injection VulnerabilityAdded 24 Apr 2026CVE-2022-37055D-Link Routers Buffer Overflow VulnerabilityAdded 8 Dec 2025CVE-2020-25078D-Link DCS-2530L and DCS-2670L Devices Unspecified VulnerabilityAdded 5 Aug 2025CVE-2020-25079D-Link DCS-2530L and DCS-2670L Command Injection VulnerabilityAdded 5 Aug 2025CVE-2022-40799D-Link DNR-322L Download of Code Without Integrity Check VulnerabilityAdded 5 Aug 2025CVE-2024-0769 D-Link DIR-859 Router Path Traversal VulnerabilityAdded 25 Jun 2025

All 26 exploited D-Link vulnerabilities

Not Sure If You Are Exposed?

Our attack surface and vulnerability teams can check your internet-facing estate for CVE-2013-5223 and every other exploited flaw on the list.

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Evidence

Sources

  1. CISA Known Exploited Vulnerabilities catalogue
  2. NVD: CVE-2013-5223
  3. CVE record: CVE-2013-5223
  4. FIRST EPSS
  5. osvdb.org/99611
  6. osvdb.org/99609
  7. exchange.xforce.ibmcloud.com/vulnerabilities/88723
  8. exchange.xforce.ibmcloud.com/vulnerabilities/88724
  9. osvdb.org/99605
  10. securityadvisories.dlink.com/security/publication.aspx?name=SAP10002
  11. osvdb.org/99607
  12. osvdb.org/99608