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CVE-2021-35395 is a set of vulnerabilities in the HTTP management interface shipped with Realtek Jungle SDK v2.x through v3.4.14B for access point and router platforms. The affected web server implementations include both the GoAhead-based "webs" binary and the Boa-based "boa" binary. Reported flaws include multiple stack-based buffer overflows caused by unsafe copying of attacker-controlled parameters in handlers such as formRebootCheck, formWsc, formWlanMultipleAP, formWlSiteSurvey, and formStaticDHCP, as well as arbitrary command execution and command injection in handlers including formSysCmd and formWsc. Vulnerable parameters include management form inputs such as submit-url, ifname, hostname, sysCmd, and peerPin. Because these handlers process HTTP requests to the device management interface, a remote attacker can supply crafted input that corrupts stack memory or injects shell commands. The exact reachable attack surface varies by downstream vendor integration, authentication model, and enabled features, but the underlying SDK code exposes multiple paths to remote code execution on affected devices.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Realtek AP-Router SDK vulnerability involving command injection and out-of-bounds write, exploited by Zerobot.
A vulnerability for which Microsoft Defender for IoT has alerting because exploitation may be tied to Zerobot activity.
Stack-based buffer overflow vulnerability in the SFK component for a WiFi chipset used in IoT/embedded devices; noted as exploited in the wild (per CISA KEV).
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.