Liman Render Engine CVE-2026-77707

Exploitation requires the attacker to occupy an active man-in-the-middle position on the network path between a Liman Render Engine endpoint and its peer - the flaw is improper TLS/certificate validation (CWE-295), so the attacker must intercept the connection and present a fraudulent or invalid certificate that the engine wrongly accepts. This positioning requirement (reflected in AC:H) is the primary limiter: the vulnerability is not remotely exploitable against a default configuration without first controlling network traffic. No authentication (PR:N) and no user interaction (UI:N) are needed once the AiTM position is achieved. Impact is limited to confidentiality (interception/decryption of sensitive data); there is no direct integrity or availability effect per the vendor scoring. Only Liman Render Engine versions from 1.0 before 1.2-75 are affected.

This is a genuine but modest-priority issue. Every signal points to limited real-world risk. The CVSS 3.1 base score is 5.9 (MEDIUM) driven by AV:N/AC:H/PR:N/UI:N with C:H/I:N/A:N - the high confidentiality but zero integrity/availability impact reflects a pure information-disclosure exposure via man-in-the-middle interception, and the AC:H reflects the meaningful precondition that an attacker must already occupy a privileged network position. CISA SSVC reinforces the low urgency: Exploitation=none (no observed or public exploitation), Automatable=no (the AiTM positioning requirement resists mass automation), Technical Impact=partial. There is no EPSS score, no CISA KEV listing, and no public POC in the provided data, so this is 'no public exploit identified at time of analysis.' No signals conflict - CVSS, SSVC, and the absence of exploitation evidence all agree this is a targeted, position-dependent confidentiality weakness rather than a widely-weaponized flaw. One note for verification: the CWE-295 (improper certificate validation) mapping is consistent with the AiTM description and the C:H/I:N/A:N impact, though a certificate-validation flaw could in principle also enable content tampering (integrity) if an attacker actively rewrites intercepted traffic - the vendor scored I:N, treating it as passive decryption only; defenders relying on this channel's integrity should confirm with HAVELSAN.

An attacker positioned on the network path between a Liman Render Engine client and its server (e.g., on a shared LAN, compromised router, or rogue Wi-Fi) presents a fraudulent TLS certificate that the engine fails to properly validate. Because the certificate check is improper, the client accepts the malicious endpoint, letting the attacker transparently decrypt and read sensitive rendered content or credentials in transit. No public exploit code is identified, and the attack requires the adversary to first achieve the man-in-the-middle position, which limits opportunistic use.