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VulnerabilityPublished

CVE-2025-11338: D-Link DI-7100G C1 · Buffer Overflow

Affects D-Link DI-7100G C1Source CVE Database V5

0

Not known to be exploited · CVSS 8.7 High.

Data as of 26 Oct 2026, 09:15 UTC

CVSS 4.0 base score
8.7High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.9% chance of exploitation in 30 days – higher than 62% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 Oct 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
D-Link DI-7100G C1Affected
  • =20250928
Fixed in–

AI-suggested

1. Immediate network-level mitigation: Block or restrict access to the /webchat/login.cgi endpoint on the DI-7100G C1 devices using firewalls or intrusion prevention systems to prevent exploitation attempts. 2. Network segmentation: Isolate vulnerable devices from critical internal networks to limit potential lateral movement if compromised. 3. Monitor network traffic for anomalous requests targeting the 'openid' parameter or unusual HTTP POST requests to the vulnerable CGI script. 4. Deploy host-based intrusion detection systems (HIDS) on networks hosting these devices to detect exploitation attempts. 5. Engage with D-Link support channels to obtain firmware updates or patches as soon as they become available and apply them promptly. 6. If patching is delayed, consider temporary device replacement or disabling vulnerable services where feasible. 7. Conduct regular vulnerability scans and penetration tests to identify the presence of vulnerable devices and verify mitigation effectiveness. 8. Educate network administrators about this vulnerability and ensure incident response plans include procedures for this specific threat.

Description

A flaw has been found in D-Link DI-7100G C1 up to 20250928. This vulnerability affects the function sub_4C0990 of the file /webchat/login.cgi of the component jhttpd. Executing manipulation of the argument openid can lead to buffer overflow. It is possible to launch the attack remotely. The exploit has been published and may be used.

References

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